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Finding the Fourth Proportional to 210,780.90, 315,916.61 and 121,851.41

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Solution

The fourth proportional to 210,780.90, 315,916.61 and 121,851.41 is: 182,629.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,780.90 : 315,916.61 = 121,851.41 : x
  2. Step 2: Convert to fraction form
    210,780.90/315,916.61 = 121,851.41/x
  3. Step 3: Cross multiply
    210,780.90x = 315,916.61 × 121,851.41
  4. Step 4: Simplify right side
    210,780.90x = 38,494,882,182.08
  5. Step 5: Solve for x
    x = 38,494,882,182.08/210,780.90
  6. Step 6: Final answer
    x = 182,629.84

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