Finding the Fourth Proportional to 99.57, 149.27 and 82.41

Step by Step Solution

1. Step 1: Write the proportion equation
   99.57 : 149.27 = 82.41 : x
2. Step 2: Convert to fraction form
   99.57/149.27 = 82.41/x
3. Step 3: Cross multiply
   99.57x = 149.27 × 82.41
4. Step 4: Simplify right side
   99.57x = 12,301.55
5. Step 5: Solve for x
   x = 12,301.55/99.57
6. Step 6: Final answer
   x = 123.55