Finding the Fourth Proportional to 139,231.30, 192,139.37 and 75,569.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,231.30 : 192,139.37 = 75,569.10 : x
2. Step 2: Convert to fraction form
   139,231.30/192,139.37 = 75,569.10/x
3. Step 3: Cross multiply
   139,231.30x = 192,139.37 × 75,569.10
4. Step 4: Simplify right side
   139,231.30x = 14,519,799,265.47
5. Step 5: Solve for x
   x = 14,519,799,265.47/139,231.30
6. Step 6: Final answer
   x = 104,285.45