Finding the Fourth Proportional to 139,132.94, 192,003.48 and 78,702.35

Step by Step Solution

1. Step 1: Write the proportion equation
   139,132.94 : 192,003.48 = 78,702.35 : x
2. Step 2: Convert to fraction form
   139,132.94/192,003.48 = 78,702.35/x
3. Step 3: Cross multiply
   139,132.94x = 192,003.48 × 78,702.35
4. Step 4: Simplify right side
   139,132.94x = 15,111,124,124.16
5. Step 5: Solve for x
   x = 15,111,124,124.16/139,132.94
6. Step 6: Final answer
   x = 108,609.25