Finding the Fourth Proportional to 139,449.43, 192,432.83 and 79,020.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,449.43 : 192,432.83 = 79,020.80 : x
2. Step 2: Convert to fraction form
   139,449.43/192,432.83 = 79,020.80/x
3. Step 3: Cross multiply
   139,449.43x = 192,432.83 × 79,020.80
4. Step 4: Simplify right side
   139,449.43x = 15,206,196,172.86
5. Step 5: Solve for x
   x = 15,206,196,172.86/139,449.43
6. Step 6: Final answer
   x = 109,044.52