Finding the Fourth Proportional to 82.91, 124.25 and 64.55

Step by Step Solution

1. Step 1: Write the proportion equation
   82.91 : 124.25 = 64.55 : x
2. Step 2: Convert to fraction form
   82.91/124.25 = 64.55/x
3. Step 3: Cross multiply
   82.91x = 124.25 × 64.55
4. Step 4: Simplify right side
   82.91x = 8,019.39
5. Step 5: Solve for x
   x = 8,019.39/82.91
6. Step 6: Final answer
   x = 96.73