Finding the Fourth Proportional to 1,017.35, 1,403.42 and 663.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.35 : 1,403.42 = 663.25 : x
2. Step 2: Convert to fraction form
   1,017.35/1,403.42 = 663.25/x
3. Step 3: Cross multiply
   1,017.35x = 1,403.42 × 663.25
4. Step 4: Simplify right side
   1,017.35x = 930,811.30
5. Step 5: Solve for x
   x = 930,811.30/1,017.35
6. Step 6: Final answer
   x = 914.94