Finding the Fourth Proportional to 139,233.24, 192,150.72 and 78,780.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,233.24 : 192,150.72 = 78,780.96 : x
2. Step 2: Convert to fraction form
   139,233.24/192,150.72 = 78,780.96/x
3. Step 3: Cross multiply
   139,233.24x = 192,150.72 × 78,780.96
4. Step 4: Simplify right side
   139,233.24x = 15,137,818,186.29
5. Step 5: Solve for x
   x = 15,137,818,186.29/139,233.24
6. Step 6: Final answer
   x = 108,722.73