Finding the Fourth Proportional to 1,105.24, 1,525.85 and 663.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.24 : 1,525.85 = 663.25 : x
2. Step 2: Convert to fraction form
   1,105.24/1,525.85 = 663.25/x
3. Step 3: Cross multiply
   1,105.24x = 1,525.85 × 663.25
4. Step 4: Simplify right side
   1,105.24x = 1,012,020.01
5. Step 5: Solve for x
   x = 1,012,020.01/1,105.24
6. Step 6: Final answer
   x = 915.66