Finding the Fourth Proportional to 1,105.50, 1,525.17 and 663.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.50 : 1,525.17 = 663.24 : x
2. Step 2: Convert to fraction form
   1,105.50/1,525.17 = 663.24/x
3. Step 3: Cross multiply
   1,105.50x = 1,525.17 × 663.24
4. Step 4: Simplify right side
   1,105.50x = 1,011,553.75
5. Step 5: Solve for x
   x = 1,011,553.75/1,105.50
6. Step 6: Final answer
   x = 915.02