Finding the Fourth Proportional to 139,669.42, 192,748.17 and 79,242.61

Step by Step Solution

1. Step 1: Write the proportion equation
   139,669.42 : 192,748.17 = 79,242.61 : x
2. Step 2: Convert to fraction form
   139,669.42/192,748.17 = 79,242.61/x
3. Step 3: Cross multiply
   139,669.42x = 192,748.17 × 79,242.61
4. Step 4: Simplify right side
   139,669.42x = 15,273,868,063.52
5. Step 5: Solve for x
   x = 15,273,868,063.52/139,669.42
6. Step 6: Final answer
   x = 109,357.28