Finding the Fourth Proportional to 1,083.06, 1,494.56 and 663.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.06 : 1,494.56 = 663.48 : x
2. Step 2: Convert to fraction form
   1,083.06/1,494.56 = 663.48/x
3. Step 3: Cross multiply
   1,083.06x = 1,494.56 × 663.48
4. Step 4: Simplify right side
   1,083.06x = 991,610.67
5. Step 5: Solve for x
   x = 991,610.67/1,083.06
6. Step 6: Final answer
   x = 915.56