Finding the Fourth Proportional to 231,048.72, 318,835.82 and 129,053.88

Step by Step Solution

1. Step 1: Write the proportion equation
   231,048.72 : 318,835.82 = 129,053.88 : x
2. Step 2: Convert to fraction form
   231,048.72/318,835.82 = 129,053.88/x
3. Step 3: Cross multiply
   231,048.72x = 318,835.82 × 129,053.88
4. Step 4: Simplify right side
   231,048.72x = 41,146,999,008.71
5. Step 5: Solve for x
   x = 41,146,999,008.71/231,048.72
6. Step 6: Final answer
   x = 178,087.98