Finding the Fourth Proportional to 209,106.30, 288,565.89 and 113,612.16

Step by Step Solution

1. Step 1: Write the proportion equation
   209,106.30 : 288,565.89 = 113,612.16 : x
2. Step 2: Convert to fraction form
   209,106.30/288,565.89 = 113,612.16/x
3. Step 3: Cross multiply
   209,106.30x = 288,565.89 × 113,612.16
4. Step 4: Simplify right side
   209,106.30x = 32,784,594,065.22
5. Step 5: Solve for x
   x = 32,784,594,065.22/209,106.30
6. Step 6: Final answer
   x = 156,784.34