Finding the Fourth Proportional to 209,103.72, 288,562.66 and 113,610.79

Step by Step Solution

1. Step 1: Write the proportion equation
   209,103.72 : 288,562.66 = 113,610.79 : x
2. Step 2: Convert to fraction form
   209,103.72/288,562.66 = 113,610.79/x
3. Step 3: Cross multiply
   209,103.72x = 288,562.66 × 113,610.79
4. Step 4: Simplify right side
   209,103.72x = 32,783,831,767.10
5. Step 5: Solve for x
   x = 32,783,831,767.10/209,103.72
6. Step 6: Final answer
   x = 156,782.63