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Finding the Fourth Proportional to 378,424.31, 522,206.80 and 215,059.59

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Solution

The fourth proportional to 378,424.31, 522,206.80 and 215,059.59 is: 296,771.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,424.31 : 522,206.80 = 215,059.59 : x
  2. Step 2: Convert to fraction form
    378,424.31/522,206.80 = 215,059.59/x
  3. Step 3: Cross multiply
    378,424.31x = 522,206.80 × 215,059.59
  4. Step 4: Simplify right side
    378,424.31x = 112,305,579,765.56
  5. Step 5: Solve for x
    x = 112,305,579,765.56/378,424.31
  6. Step 6: Final answer
    x = 296,771.58

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