Finding the Fourth Proportional to 209,145.02, 288,614.31 and 113,648.54

Step by Step Solution

1. Step 1: Write the proportion equation
   209,145.02 : 288,614.31 = 113,648.54 : x
2. Step 2: Convert to fraction form
   209,145.02/288,614.31 = 113,648.54/x
3. Step 3: Cross multiply
   209,145.02x = 288,614.31 × 113,648.54
4. Step 4: Simplify right side
   209,145.02x = 32,800,594,954.61
5. Step 5: Solve for x
   x = 32,800,594,954.61/209,145.02
6. Step 6: Final answer
   x = 156,831.82