Finding the Fourth Proportional to 81,510.72, 112,487.68 and 45,701.20

Step by Step Solution

1. Step 1: Write the proportion equation
   81,510.72 : 112,487.68 = 45,701.20 : x
2. Step 2: Convert to fraction form
   81,510.72/112,487.68 = 45,701.20/x
3. Step 3: Cross multiply
   81,510.72x = 112,487.68 × 45,701.20
4. Step 4: Simplify right side
   81,510.72x = 5,140,821,961.22
5. Step 5: Solve for x
   x = 5,140,821,961.22/81,510.72
6. Step 6: Final answer
   x = 63,069.27