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Finding the Fourth Proportional to 76,798, 115,203.60 and 21,394

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Solution

The fourth proportional to 76,798, 115,203.60 and 21,394 is: 32,092.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,798 : 115,203.60 = 21,394 : x
  2. Step 2: Convert to fraction form
    76,798/115,203.60 = 21,394/x
  3. Step 3: Cross multiply
    76,798x = 115,203.60 × 21,394
  4. Step 4: Simplify right side
    76,798x = 2,464,665,818.40
  5. Step 5: Solve for x
    x = 2,464,665,818.40/76,798
  6. Step 6: Final answer
    x = 32,092.84

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