Finding the Fourth Proportional to 139,222.98, 192,128.49 and 78,793.74

Step by Step Solution

1. Step 1: Write the proportion equation
   139,222.98 : 192,128.49 = 78,793.74 : x
2. Step 2: Convert to fraction form
   139,222.98/192,128.49 = 78,793.74/x
3. Step 3: Cross multiply
   139,222.98x = 192,128.49 × 78,793.74
4. Step 4: Simplify right side
   139,222.98x = 15,138,522,287.65
5. Step 5: Solve for x
   x = 15,138,522,287.65/139,222.98
6. Step 6: Final answer
   x = 108,735.80