Finding the Fourth Proportional to 139,144.95, 192,020.04 and 78,714.36

Step by Step Solution

1. Step 1: Write the proportion equation
   139,144.95 : 192,020.04 = 78,714.36 : x
2. Step 2: Convert to fraction form
   139,144.95/192,020.04 = 78,714.36/x
3. Step 3: Cross multiply
   139,144.95x = 192,020.04 × 78,714.36
4. Step 4: Simplify right side
   139,144.95x = 15,114,734,555.77
5. Step 5: Solve for x
   x = 15,114,734,555.77/139,144.95
6. Step 6: Final answer
   x = 108,625.82