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Finding the Fourth Proportional to 1,320,488.20, 1,978,982.70 and 1,170,022.60

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Solution

The fourth proportional to 1,320,488.20, 1,978,982.70 and 1,170,022.60 is: 1,753,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,488.20 : 1,978,982.70 = 1,170,022.60 : x
  2. Step 2: Convert to fraction form
    1,320,488.20/1,978,982.70 = 1,170,022.60/x
  3. Step 3: Cross multiply
    1,320,488.20x = 1,978,982.70 × 1,170,022.60
  4. Step 4: Simplify right side
    1,320,488.20x = 2,315,454,484,009.02
  5. Step 5: Solve for x
    x = 2,315,454,484,009.02/1,320,488.20
  6. Step 6: Final answer
    x = 1,753,483.66

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