Finding the Fourth Proportional to 139,053.12, 191,891.52 and 75,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,053.12 : 191,891.52 = 75,390.72 : x
2. Step 2: Convert to fraction form
   139,053.12/191,891.52 = 75,390.72/x
3. Step 3: Cross multiply
   139,053.12x = 191,891.52 × 75,390.72
4. Step 4: Simplify right side
   139,053.12x = 14,466,839,854.69
5. Step 5: Solve for x
   x = 14,466,839,854.69/139,053.12
6. Step 6: Final answer
   x = 104,038.23