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Finding the Fourth Proportional to 265,843.76, 398,805.54 and 85,869.08

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Solution

The fourth proportional to 265,843.76, 398,805.54 and 85,869.08 is: 128,816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,843.76 : 398,805.54 = 85,869.08 : x
  2. Step 2: Convert to fraction form
    265,843.76/398,805.54 = 85,869.08/x
  3. Step 3: Cross multiply
    265,843.76x = 398,805.54 × 85,869.08
  4. Step 4: Simplify right side
    265,843.76x = 34,245,064,818.70
  5. Step 5: Solve for x
    x = 34,245,064,818.70/265,843.76
  6. Step 6: Final answer
    x = 128,816.51

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