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Finding the Fourth Proportional to 1,984,978,289.80, 2,978,105,163.90 and 1,330,668,130.60

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Solution

The fourth proportional to 1,984,978,289.80, 2,978,105,163.90 and 1,330,668,130.60 is: 1,996,429,709.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984,978,289.80 : 2,978,105,163.90 = 1,330,668,130.60 : x
  2. Step 2: Convert to fraction form
    1,984,978,289.80/2,978,105,163.90 = 1,330,668,130.60/x
  3. Step 3: Cross multiply
    1,984,978,289.80x = 2,978,105,163.90 × 1,330,668,130.60
  4. Step 4: Simplify right side
    1,984,978,289.80x = 3,962,869,631,177,019,392
  5. Step 5: Solve for x
    x = 3,962,869,631,177,019,392/1,984,978,289.80
  6. Step 6: Final answer
    x = 1,996,429,709.86

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