Finding the Fourth Proportional to 139,261.78, 192,225.00 and 88,960.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,261.78 : 192,225.00 = 88,960.78 : x
2. Step 2: Convert to fraction form
   139,261.78/192,225.00 = 88,960.78/x
3. Step 3: Cross multiply
   139,261.78x = 192,225.00 × 88,960.78
4. Step 4: Simplify right side
   139,261.78x = 17,100,486,008.98
5. Step 5: Solve for x
   x = 17,100,486,008.98/139,261.78
6. Step 6: Final answer
   x = 122,793.82