Finding the Fourth Proportional to 82,128.22, 113,328.49 and 60,629.40

Step by Step Solution

1. Step 1: Write the proportion equation
   82,128.22 : 113,328.49 = 60,629.40 : x
2. Step 2: Convert to fraction form
   82,128.22/113,328.49 = 60,629.40/x
3. Step 3: Cross multiply
   82,128.22x = 113,328.49 × 60,629.40
4. Step 4: Simplify right side
   82,128.22x = 6,871,038,200.03
5. Step 5: Solve for x
   x = 6,871,038,200.03/82,128.22
6. Step 6: Final answer
   x = 83,662.33