Finding the Fourth Proportional to 139,231.69, 192,139.87 and 75,569.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,231.69 : 192,139.87 = 75,569.50 : x
2. Step 2: Convert to fraction form
   139,231.69/192,139.87 = 75,569.50/x
3. Step 3: Cross multiply
   139,231.69x = 192,139.87 × 75,569.50
4. Step 4: Simplify right side
   139,231.69x = 14,519,912,756.34
5. Step 5: Solve for x
   x = 14,519,912,756.34/139,231.69
6. Step 6: Final answer
   x = 104,285.98