Finding the Fourth Proportional to 209,105.60, 288,567.52 and 113,612.48

Step by Step Solution

1. Step 1: Write the proportion equation
   209,105.60 : 288,567.52 = 113,612.48 : x
2. Step 2: Convert to fraction form
   209,105.60/288,567.52 = 113,612.48/x
3. Step 3: Cross multiply
   209,105.60x = 288,567.52 × 113,612.48
4. Step 4: Simplify right side
   209,105.60x = 32,784,871,594.65
5. Step 5: Solve for x
   x = 32,784,871,594.65/209,105.60
6. Step 6: Final answer
   x = 156,786.20