Finding the Fourth Proportional to 256,784.91, 354,411.82 and 172,049.19

Step by Step Solution

1. Step 1: Write the proportion equation
   256,784.91 : 354,411.82 = 172,049.19 : x
2. Step 2: Convert to fraction form
   256,784.91/354,411.82 = 172,049.19/x
3. Step 3: Cross multiply
   256,784.91x = 354,411.82 × 172,049.19
4. Step 4: Simplify right side
   256,784.91x = 60,976,266,557.43
5. Step 5: Solve for x
   x = 60,976,266,557.43/256,784.91
6. Step 6: Final answer
   x = 237,460.47