Finding the Fourth Proportional to 209,123.06, 288,591.57 and 113,629.77

Step by Step Solution

1. Step 1: Write the proportion equation
   209,123.06 : 288,591.57 = 113,629.77 : x
2. Step 2: Convert to fraction form
   209,123.06/288,591.57 = 113,629.77/x
3. Step 3: Cross multiply
   209,123.06x = 288,591.57 × 113,629.77
4. Step 4: Simplify right side
   209,123.06x = 32,792,593,723.04
5. Step 5: Solve for x
   x = 32,792,593,723.04/209,123.06
6. Step 6: Final answer
   x = 156,810.04