Finding the Fourth Proportional to 139,790.15, 192,903.55 and 79,352.71

Step by Step Solution

1. Step 1: Write the proportion equation
   139,790.15 : 192,903.55 = 79,352.71 : x
2. Step 2: Convert to fraction form
   139,790.15/192,903.55 = 79,352.71/x
3. Step 3: Cross multiply
   139,790.15x = 192,903.55 × 79,352.71
4. Step 4: Simplify right side
   139,790.15x = 15,307,418,780.48
5. Step 5: Solve for x
   x = 15,307,418,780.48/139,790.15
6. Step 6: Final answer
   x = 109,502.85