Finding the Fourth Proportional to 1,105.39, 1,525.51 and 663.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.39 : 1,525.51 = 663.27 : x
2. Step 2: Convert to fraction form
   1,105.39/1,525.51 = 663.27/x
3. Step 3: Cross multiply
   1,105.39x = 1,525.51 × 663.27
4. Step 4: Simplify right side
   1,105.39x = 1,011,825.02
5. Step 5: Solve for x
   x = 1,011,825.02/1,105.39
6. Step 6: Final answer
   x = 915.36