Finding the Fourth Proportional to 1,018.14, 1,404.86 and 663.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.14 : 1,404.86 = 663.97 : x
2. Step 2: Convert to fraction form
   1,018.14/1,404.86 = 663.97/x
3. Step 3: Cross multiply
   1,018.14x = 1,404.86 × 663.97
4. Step 4: Simplify right side
   1,018.14x = 932,789.14
5. Step 5: Solve for x
   x = 932,789.14/1,018.14
6. Step 6: Final answer
   x = 916.17