Finding the Fourth Proportional to 139,608.57, 192,616.33 and 79,174.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,608.57 : 192,616.33 = 79,174.47 : x
2. Step 2: Convert to fraction form
   139,608.57/192,616.33 = 79,174.47/x
3. Step 3: Cross multiply
   139,608.57x = 192,616.33 × 79,174.47
4. Step 4: Simplify right side
   139,608.57x = 15,250,295,445.22
5. Step 5: Solve for x
   x = 15,250,295,445.22/139,608.57
6. Step 6: Final answer
   x = 109,236.10