Finding the Fourth Proportional to 1,105.47, 1,525.56 and 663.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.47 : 1,525.56 = 663.38 : x
2. Step 2: Convert to fraction form
   1,105.47/1,525.56 = 663.38/x
3. Step 3: Cross multiply
   1,105.47x = 1,525.56 × 663.38
4. Step 4: Simplify right side
   1,105.47x = 1,012,025.99
5. Step 5: Solve for x
   x = 1,012,025.99/1,105.47
6. Step 6: Final answer
   x = 915.47