Finding the Fourth Proportional to 209,107.30, 288,567.27 and 113,613.16

Step by Step Solution

1. Step 1: Write the proportion equation
   209,107.30 : 288,567.27 = 113,613.16 : x
2. Step 2: Convert to fraction form
   209,107.30/288,567.27 = 113,613.16/x
3. Step 3: Cross multiply
   209,107.30x = 288,567.27 × 113,613.16
4. Step 4: Simplify right side
   209,107.30x = 32,785,039,417.27
5. Step 5: Solve for x
   x = 32,785,039,417.27/209,107.30
6. Step 6: Final answer
   x = 156,785.72