Finding the Fourth Proportional to 82.18, 123.29 and 59.47

Step by Step Solution

1. Step 1: Write the proportion equation
   82.18 : 123.29 = 59.47 : x
2. Step 2: Convert to fraction form
   82.18/123.29 = 59.47/x
3. Step 3: Cross multiply
   82.18x = 123.29 × 59.47
4. Step 4: Simplify right side
   82.18x = 7,331.67
5. Step 5: Solve for x
   x = 7,331.67/82.18
6. Step 6: Final answer
   x = 89.21