Finding the Fourth Proportional to 81,258.72, 112,138.20 and 45,450.24

Step by Step Solution

1. Step 1: Write the proportion equation
   81,258.72 : 112,138.20 = 45,450.24 : x
2. Step 2: Convert to fraction form
   81,258.72/112,138.20 = 45,450.24/x
3. Step 3: Cross multiply
   81,258.72x = 112,138.20 × 45,450.24
4. Step 4: Simplify right side
   81,258.72x = 5,096,708,103.17
5. Step 5: Solve for x
   x = 5,096,708,103.17/81,258.72
6. Step 6: Final answer
   x = 62,721.98