Finding the Fourth Proportional to 139,726.10, 192,848.60 and 79,302.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,726.10 : 192,848.60 = 79,302.42 : x
2. Step 2: Convert to fraction form
   139,726.10/192,848.60 = 79,302.42/x
3. Step 3: Cross multiply
   139,726.10x = 192,848.60 × 79,302.42
4. Step 4: Simplify right side
   139,726.10x = 15,293,360,673.61
5. Step 5: Solve for x
   x = 15,293,360,673.61/139,726.10
6. Step 6: Final answer
   x = 109,452.43