Finding the Fourth Proportional to 82.41, 123.63 and 21.55

Step by Step Solution

1. Step 1: Write the proportion equation
   82.41 : 123.63 = 21.55 : x
2. Step 2: Convert to fraction form
   82.41/123.63 = 21.55/x
3. Step 3: Cross multiply
   82.41x = 123.63 × 21.55
4. Step 4: Simplify right side
   82.41x = 2,663.55
5. Step 5: Solve for x
   x = 2,663.55/82.41
6. Step 6: Final answer
   x = 32.32