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Finding the Fourth Proportional to 338,455.70, 507,679.91 and 138,731.57

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Solution

The fourth proportional to 338,455.70, 507,679.91 and 138,731.57 is: 208,095.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,455.70 : 507,679.91 = 138,731.57 : x
  2. Step 2: Convert to fraction form
    338,455.70/507,679.91 = 138,731.57/x
  3. Step 3: Cross multiply
    338,455.70x = 507,679.91 × 138,731.57
  4. Step 4: Simplify right side
    338,455.70x = 70,431,232,067.54
  5. Step 5: Solve for x
    x = 70,431,232,067.54/338,455.70
  6. Step 6: Final answer
    x = 208,095.86

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