Finding the Fourth Proportional to 316,781.30, 437,158.17 and 189,456.89

Step by Step Solution

1. Step 1: Write the proportion equation
   316,781.30 : 437,158.17 = 189,456.89 : x
2. Step 2: Convert to fraction form
   316,781.30/437,158.17 = 189,456.89/x
3. Step 3: Cross multiply
   316,781.30x = 437,158.17 × 189,456.89
4. Step 4: Simplify right side
   316,781.30x = 82,822,627,326.29
5. Step 5: Solve for x
   x = 82,822,627,326.29/316,781.30
6. Step 6: Final answer
   x = 261,450.49