Finding the Fourth Proportional to 238,310.72, 328,874.52 and 129,419.60

Step by Step Solution

1. Step 1: Write the proportion equation
   238,310.72 : 328,874.52 = 129,419.60 : x
2. Step 2: Convert to fraction form
   238,310.72/328,874.52 = 129,419.60/x
3. Step 3: Cross multiply
   238,310.72x = 328,874.52 × 129,419.60
4. Step 4: Simplify right side
   238,310.72x = 42,562,808,828.59
5. Step 5: Solve for x
   x = 42,562,808,828.59/238,310.72
6. Step 6: Final answer
   x = 178,602.16