Finding the Fourth Proportional to 139,777.98, 192,891.71 and 79,348.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,777.98 : 192,891.71 = 79,348.10 : x
2. Step 2: Convert to fraction form
   139,777.98/192,891.71 = 79,348.10/x
3. Step 3: Cross multiply
   139,777.98x = 192,891.71 × 79,348.10
4. Step 4: Simplify right side
   139,777.98x = 15,305,589,333.05
5. Step 5: Solve for x
   x = 15,305,589,333.05/139,777.98
6. Step 6: Final answer
   x = 109,499.29