Finding the Fourth Proportional to 1,083.09, 1,494.78 and 663.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,083.09 : 1,494.78 = 663.72 : x
2. Step 2: Convert to fraction form
   1,083.09/1,494.78 = 663.72/x
3. Step 3: Cross multiply
   1,083.09x = 1,494.78 × 663.72
4. Step 4: Simplify right side
   1,083.09x = 992,115.38
5. Step 5: Solve for x
   x = 992,115.38/1,083.09
6. Step 6: Final answer
   x = 916.00