Finding the Fourth Proportional to 139,517.61, 192,540.88 and 79,089.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,517.61 : 192,540.88 = 79,089.42 : x
2. Step 2: Convert to fraction form
   139,517.61/192,540.88 = 79,089.42/x
3. Step 3: Cross multiply
   139,517.61x = 192,540.88 × 79,089.42
4. Step 4: Simplify right side
   139,517.61x = 15,227,946,130.04
5. Step 5: Solve for x
   x = 15,227,946,130.04/139,517.61
6. Step 6: Final answer
   x = 109,147.13