Finding the Fourth Proportional to 139,062.69, 191,904.66 and 75,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062.69 : 191,904.66 = 75,399.12 : x
2. Step 2: Convert to fraction form
   139,062.69/191,904.66 = 75,399.12/x
3. Step 3: Cross multiply
   139,062.69x = 191,904.66 × 75,399.12
4. Step 4: Simplify right side
   139,062.69x = 14,469,442,487.90
5. Step 5: Solve for x
   x = 14,469,442,487.90/139,062.69
6. Step 6: Final answer
   x = 104,049.78