Finding the Fourth Proportional to 139,223.29, 192,128.28 and 75,561.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,223.29 : 192,128.28 = 75,561.12 : x
2. Step 2: Convert to fraction form
   139,223.29/192,128.28 = 75,561.12/x
3. Step 3: Cross multiply
   139,223.29x = 192,128.28 × 75,561.12
4. Step 4: Simplify right side
   139,223.29x = 14,517,428,020.47
5. Step 5: Solve for x
   x = 14,517,428,020.47/139,223.29
6. Step 6: Final answer
   x = 104,274.42