Finding the Fourth Proportional to 82.96, 114.54 and 64.50

Step by Step Solution

1. Step 1: Write the proportion equation
   82.96 : 114.54 = 64.50 : x
2. Step 2: Convert to fraction form
   82.96/114.54 = 64.50/x
3. Step 3: Cross multiply
   82.96x = 114.54 × 64.50
4. Step 4: Simplify right side
   82.96x = 7,387.83
5. Step 5: Solve for x
   x = 7,387.83/82.96
6. Step 6: Final answer
   x = 89.05