Finding the Fourth Proportional to 83,499.26, 124,790.43 and 61,057.20

Step by Step Solution

1. Step 1: Write the proportion equation
   83,499.26 : 124,790.43 = 61,057.20 : x
2. Step 2: Convert to fraction form
   83,499.26/124,790.43 = 61,057.20/x
3. Step 3: Cross multiply
   83,499.26x = 124,790.43 × 61,057.20
4. Step 4: Simplify right side
   83,499.26x = 7,619,354,242.60
5. Step 5: Solve for x
   x = 7,619,354,242.60/83,499.26
6. Step 6: Final answer
   x = 91,250.57