Finding the Fourth Proportional to 10.17, 15.25 and 5.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10.17 : 15.25 = 5.10 : x
2. Step 2: Convert to fraction form
   10.17/15.25 = 5.10/x
3. Step 3: Cross multiply
   10.17x = 15.25 × 5.10
4. Step 4: Simplify right side
   10.17x = 77.78
5. Step 5: Solve for x
   x = 77.78/10.17
6. Step 6: Final answer
   x = 7.65