Finding the Fourth Proportional to 139,652.82, 192,786.21 and 89,380.98

Step by Step Solution

1. Step 1: Write the proportion equation
   139,652.82 : 192,786.21 = 89,380.98 : x
2. Step 2: Convert to fraction form
   139,652.82/192,786.21 = 89,380.98/x
3. Step 3: Cross multiply
   139,652.82x = 192,786.21 × 89,380.98
4. Step 4: Simplify right side
   139,652.82x = 17,231,420,380.29
5. Step 5: Solve for x
   x = 17,231,420,380.29/139,652.82
6. Step 6: Final answer
   x = 123,387.56