Finding the Fourth Proportional to 139,280.28, 192,201.54 and 75,616.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,280.28 : 192,201.54 = 75,616.71 : x
2. Step 2: Convert to fraction form
   139,280.28/192,201.54 = 75,616.71/x
3. Step 3: Cross multiply
   139,280.28x = 192,201.54 × 75,616.71
4. Step 4: Simplify right side
   139,280.28x = 14,533,648,111.73
5. Step 5: Solve for x
   x = 14,533,648,111.73/139,280.28
6. Step 6: Final answer
   x = 104,348.21