Finding the Fourth Proportional to 172,611.10, 258,942.17 and 88,418.89

Step by Step Solution

1. Step 1: Write the proportion equation
   172,611.10 : 258,942.17 = 88,418.89 : x
2. Step 2: Convert to fraction form
   172,611.10/258,942.17 = 88,418.89/x
3. Step 3: Cross multiply
   172,611.10x = 258,942.17 × 88,418.89
4. Step 4: Simplify right side
   172,611.10x = 22,895,379,245.59
5. Step 5: Solve for x
   x = 22,895,379,245.59/172,611.10
6. Step 6: Final answer
   x = 132,641.41