Finding the Fourth Proportional to 82.48, 123.54 and 64.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82.48 : 123.54 = 64.15 : x
2. Step 2: Convert to fraction form
   82.48/123.54 = 64.15/x
3. Step 3: Cross multiply
   82.48x = 123.54 × 64.15
4. Step 4: Simplify right side
   82.48x = 7,925.09
5. Step 5: Solve for x
   x = 7,925.09/82.48
6. Step 6: Final answer
   x = 96.09