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Finding the Fourth Proportional to 1,978,059.20, 2,965,792.80 and 779,259.20

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Solution

The fourth proportional to 1,978,059.20, 2,965,792.80 and 779,259.20 is: 1,168,378.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,978,059.20 : 2,965,792.80 = 779,259.20 : x
  2. Step 2: Convert to fraction form
    1,978,059.20/2,965,792.80 = 779,259.20/x
  3. Step 3: Cross multiply
    1,978,059.20x = 2,965,792.80 × 779,259.20
  4. Step 4: Simplify right side
    1,978,059.20x = 2,311,121,324,693.76
  5. Step 5: Solve for x
    x = 2,311,121,324,693.76/1,978,059.20
  6. Step 6: Final answer
    x = 1,168,378.24

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