Finding the Fourth Proportional to 1,105.96, 1,525.82 and 664

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.96 : 1,525.82 = 664 : x
2. Step 2: Convert to fraction form
   1,105.96/1,525.82 = 664/x
3. Step 3: Cross multiply
   1,105.96x = 1,525.82 × 664
4. Step 4: Simplify right side
   1,105.96x = 1,013,144.48
5. Step 5: Solve for x
   x = 1,013,144.48/1,105.96
6. Step 6: Final answer
   x = 916.08