Finding the Fourth Proportional to 40,128.60, 55,372.84 and 23,132.71

Step by Step Solution

1. Step 1: Write the proportion equation
   40,128.60 : 55,372.84 = 23,132.71 : x
2. Step 2: Convert to fraction form
   40,128.60/55,372.84 = 23,132.71/x
3. Step 3: Cross multiply
   40,128.60x = 55,372.84 × 23,132.71
4. Step 4: Simplify right side
   40,128.60x = 1,280,923,849.60
5. Step 5: Solve for x
   x = 1,280,923,849.60/40,128.60
6. Step 6: Final answer
   x = 31,920.47