Finding the Fourth Proportional to 139,662.29, 192,738.30 and 79,235.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,662.29 : 192,738.30 = 79,235.48 : x
2. Step 2: Convert to fraction form
   139,662.29/192,738.30 = 79,235.48/x
3. Step 3: Cross multiply
   139,662.29x = 192,738.30 × 79,235.48
4. Step 4: Simplify right side
   139,662.29x = 15,271,711,714.88
5. Step 5: Solve for x
   x = 15,271,711,714.88/139,662.29
6. Step 6: Final answer
   x = 109,347.42