Finding the Fourth Proportional to 40,061.16, 55,285.47 and 21,912.71

Step by Step Solution

1. Step 1: Write the proportion equation
   40,061.16 : 55,285.47 = 21,912.71 : x
2. Step 2: Convert to fraction form
   40,061.16/55,285.47 = 21,912.71/x
3. Step 3: Cross multiply
   40,061.16x = 55,285.47 × 21,912.71
4. Step 4: Simplify right side
   40,061.16x = 1,211,454,194.90
5. Step 5: Solve for x
   x = 1,211,454,194.90/40,061.16
6. Step 6: Final answer
   x = 30,240.12