Finding the Fourth Proportional to 139,513.68, 192,524.79 and 79,089.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,513.68 : 192,524.79 = 79,089.87 : x
2. Step 2: Convert to fraction form
   139,513.68/192,524.79 = 79,089.87/x
3. Step 3: Cross multiply
   139,513.68x = 192,524.79 × 79,089.87
4. Step 4: Simplify right side
   139,513.68x = 15,226,760,612.88
5. Step 5: Solve for x
   x = 15,226,760,612.88/139,513.68
6. Step 6: Final answer
   x = 109,141.70