Finding the Fourth Proportional to 209,111.79, 288,567.86 and 113,616.44

Step by Step Solution

1. Step 1: Write the proportion equation
   209,111.79 : 288,567.86 = 113,616.44 : x
2. Step 2: Convert to fraction form
   209,111.79/288,567.86 = 113,616.44/x
3. Step 3: Cross multiply
   209,111.79x = 288,567.86 × 113,616.44
4. Step 4: Simplify right side
   209,111.79x = 32,786,050,940.70
5. Step 5: Solve for x
   x = 32,786,050,940.70/209,111.79
6. Step 6: Final answer
   x = 156,787.19