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Finding the Fourth Proportional to 286,640.78, 395,671.64 and 215,227.13

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Solution

The fourth proportional to 286,640.78, 395,671.64 and 215,227.13 is: 297,094.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,640.78 : 395,671.64 = 215,227.13 : x
  2. Step 2: Convert to fraction form
    286,640.78/395,671.64 = 215,227.13/x
  3. Step 3: Cross multiply
    286,640.78x = 395,671.64 × 215,227.13
  4. Step 4: Simplify right side
    286,640.78x = 85,159,268,445.10
  5. Step 5: Solve for x
    x = 85,159,268,445.10/286,640.78
  6. Step 6: Final answer
    x = 297,094.05

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