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Finding the Fourth Proportional to 265,697.66, 398,624.15 and 85,778.89

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Solution

The fourth proportional to 265,697.66, 398,624.15 and 85,778.89 is: 128,693.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,697.66 : 398,624.15 = 85,778.89 : x
  2. Step 2: Convert to fraction form
    265,697.66/398,624.15 = 85,778.89/x
  3. Step 3: Cross multiply
    265,697.66x = 398,624.15 × 85,778.89
  4. Step 4: Simplify right side
    265,697.66x = 34,193,536,332.08
  5. Step 5: Solve for x
    x = 34,193,536,332.08/265,697.66
  6. Step 6: Final answer
    x = 128,693.40

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