Finding the Fourth Proportional to 139,740, 192,852.72 and 80,135.52

Step by Step Solution

1. Step 1: Write the proportion equation
   139,740 : 192,852.72 = 80,135.52 : x
2. Step 2: Convert to fraction form
   139,740/192,852.72 = 80,135.52/x
3. Step 3: Cross multiply
   139,740x = 192,852.72 × 80,135.52
4. Step 4: Simplify right side
   139,740x = 15,454,353,000.61
5. Step 5: Solve for x
   x = 15,454,353,000.61/139,740
6. Step 6: Final answer
   x = 110,593.62