Finding the Fourth Proportional to 82.53, 113.61 and 65.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82.53 : 113.61 = 65.10 : x
2. Step 2: Convert to fraction form
   82.53/113.61 = 65.10/x
3. Step 3: Cross multiply
   82.53x = 113.61 × 65.10
4. Step 4: Simplify right side
   82.53x = 7,396.01
5. Step 5: Solve for x
   x = 7,396.01/82.53
6. Step 6: Final answer
   x = 89.62