Finding the Fourth Proportional to 139,236.88, 192,101.16 and 78,801.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,236.88 : 192,101.16 = 78,801.52 : x
2. Step 2: Convert to fraction form
   139,236.88/192,101.16 = 78,801.52/x
3. Step 3: Cross multiply
   139,236.88x = 192,101.16 × 78,801.52
4. Step 4: Simplify right side
   139,236.88x = 15,137,863,401.76
5. Step 5: Solve for x
   x = 15,137,863,401.76/139,236.88
6. Step 6: Final answer
   x = 108,720.21