Finding the Fourth Proportional to 1,105.98, 1,526.36 and 664.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.98 : 1,526.36 = 664.12 : x
2. Step 2: Convert to fraction form
   1,105.98/1,526.36 = 664.12/x
3. Step 3: Cross multiply
   1,105.98x = 1,526.36 × 664.12
4. Step 4: Simplify right side
   1,105.98x = 1,013,686.20
5. Step 5: Solve for x
   x = 1,013,686.20/1,105.98
6. Step 6: Final answer
   x = 916.55