Finding the Fourth Proportional to 209,111.76, 288,573.52 and 113,617.68

Step by Step Solution

1. Step 1: Write the proportion equation
   209,111.76 : 288,573.52 = 113,617.68 : x
2. Step 2: Convert to fraction form
   209,111.76/288,573.52 = 113,617.68/x
3. Step 3: Cross multiply
   209,111.76x = 288,573.52 × 113,617.68
4. Step 4: Simplify right side
   209,111.76x = 32,787,053,851.83
5. Step 5: Solve for x
   x = 32,787,053,851.83/209,111.76
6. Step 6: Final answer
   x = 156,792.01