Finding the Fourth Proportional to 139,386.50, 192,355.71 and 75,724.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,386.50 : 192,355.71 = 75,724.35 : x
2. Step 2: Convert to fraction form
   139,386.50/192,355.71 = 75,724.35/x
3. Step 3: Cross multiply
   139,386.50x = 192,355.71 × 75,724.35
4. Step 4: Simplify right side
   139,386.50x = 14,566,011,108.54
5. Step 5: Solve for x
   x = 14,566,011,108.54/139,386.50
6. Step 6: Final answer
   x = 104,500.87