Finding the Fourth Proportional to 329,131.55, 493,653.59 and 129,398.31

Step by Step Solution

1. Step 1: Write the proportion equation
   329,131.55 : 493,653.59 = 129,398.31 : x
2. Step 2: Convert to fraction form
   329,131.55/493,653.59 = 129,398.31/x
3. Step 3: Cross multiply
   329,131.55x = 493,653.59 × 129,398.31
4. Step 4: Simplify right side
   329,131.55x = 63,877,940,109.69
5. Step 5: Solve for x
   x = 63,877,940,109.69/329,131.55
6. Step 6: Final answer
   x = 194,080.27