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Finding the Fourth Proportional to 319,020.88, 478,594.26 and 91,318.66

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Solution

The fourth proportional to 319,020.88, 478,594.26 and 91,318.66 is: 136,996.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,020.88 : 478,594.26 = 91,318.66 : x
  2. Step 2: Convert to fraction form
    319,020.88/478,594.26 = 91,318.66/x
  3. Step 3: Cross multiply
    319,020.88x = 478,594.26 × 91,318.66
  4. Step 4: Simplify right side
    319,020.88x = 43,704,586,506.89
  5. Step 5: Solve for x
    x = 43,704,586,506.89/319,020.88
  6. Step 6: Final answer
    x = 136,996.01

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