Finding the Fourth Proportional to 152,108.88, 209,910.72 and 85,040.88

Step by Step Solution

1. Step 1: Write the proportion equation
   152,108.88 : 209,910.72 = 85,040.88 : x
2. Step 2: Convert to fraction form
   152,108.88/209,910.72 = 85,040.88/x
3. Step 3: Cross multiply
   152,108.88x = 209,910.72 × 85,040.88
4. Step 4: Simplify right side
   152,108.88x = 17,850,992,350.23
5. Step 5: Solve for x
   x = 17,850,992,350.23/152,108.88
6. Step 6: Final answer
   x = 117,356.67