Finding the Fourth Proportional to 82.00, 113.16 and 45.15

Step by Step Solution

1. Step 1: Write the proportion equation
   82.00 : 113.16 = 45.15 : x
2. Step 2: Convert to fraction form
   82.00/113.16 = 45.15/x
3. Step 3: Cross multiply
   82.00x = 113.16 × 45.15
4. Step 4: Simplify right side
   82.00x = 5,108.95
5. Step 5: Solve for x
   x = 5,108.95/82.00
6. Step 6: Final answer
   x = 62.31