Finding the Fourth Proportional to 318,116.72, 439,009.47 and 172,932.27

Step by Step Solution

1. Step 1: Write the proportion equation
   318,116.72 : 439,009.47 = 172,932.27 : x
2. Step 2: Convert to fraction form
   318,116.72/439,009.47 = 172,932.27/x
3. Step 3: Cross multiply
   318,116.72x = 439,009.47 × 172,932.27
4. Step 4: Simplify right side
   318,116.72x = 75,918,902,552.31
5. Step 5: Solve for x
   x = 75,918,902,552.31/318,116.72
6. Step 6: Final answer
   x = 238,651.09