Finding the Fourth Proportional to 152,106.50, 209,906.54 and 87,552.15

Step by Step Solution

1. Step 1: Write the proportion equation
   152,106.50 : 209,906.54 = 87,552.15 : x
2. Step 2: Convert to fraction form
   152,106.50/209,906.54 = 87,552.15/x
3. Step 3: Cross multiply
   152,106.50x = 209,906.54 × 87,552.15
4. Step 4: Simplify right side
   152,106.50x = 18,377,769,094.94
5. Step 5: Solve for x
   x = 18,377,769,094.94/152,106.50
6. Step 6: Final answer
   x = 120,821.72