Finding the Fourth Proportional to 139,540.29, 192,561.57 and 79,116.54

Step by Step Solution

1. Step 1: Write the proportion equation
   139,540.29 : 192,561.57 = 79,116.54 : x
2. Step 2: Convert to fraction form
   139,540.29/192,561.57 = 79,116.54/x
3. Step 3: Cross multiply
   139,540.29x = 192,561.57 × 79,116.54
4. Step 4: Simplify right side
   139,540.29x = 15,234,805,155.37
5. Step 5: Solve for x
   x = 15,234,805,155.37/139,540.29
6. Step 6: Final answer
   x = 109,178.54