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Finding the Fourth Proportional to 718,565.60, 991,627.60 and 396,288.80

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Solution

The fourth proportional to 718,565.60, 991,627.60 and 396,288.80 is: 546,882.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,565.60 : 991,627.60 = 396,288.80 : x
  2. Step 2: Convert to fraction form
    718,565.60/991,627.60 = 396,288.80/x
  3. Step 3: Cross multiply
    718,565.60x = 991,627.60 × 396,288.80
  4. Step 4: Simplify right side
    718,565.60x = 392,970,911,650.88
  5. Step 5: Solve for x
    x = 392,970,911,650.88/718,565.60
  6. Step 6: Final answer
    x = 546,882.44

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