Finding the Fourth Proportional to 82.18, 113.42 and 51.10

Step by Step Solution

1. Step 1: Write the proportion equation
   82.18 : 113.42 = 51.10 : x
2. Step 2: Convert to fraction form
   82.18/113.42 = 51.10/x
3. Step 3: Cross multiply
   82.18x = 113.42 × 51.10
4. Step 4: Simplify right side
   82.18x = 5,795.22
5. Step 5: Solve for x
   x = 5,795.22/82.18
6. Step 6: Final answer
   x = 70.52