Finding the Fourth Proportional to 60,128.98, 82,972.34 and 40,708.38

Step by Step Solution

1. Step 1: Write the proportion equation
   60,128.98 : 82,972.34 = 40,708.38 : x
2. Step 2: Convert to fraction form
   60,128.98/82,972.34 = 40,708.38/x
3. Step 3: Cross multiply
   60,128.98x = 82,972.34 × 40,708.38
4. Step 4: Simplify right side
   60,128.98x = 3,377,669,546.21
5. Step 5: Solve for x
   x = 3,377,669,546.21/60,128.98
6. Step 6: Final answer
   x = 56,173.74