Finding the Fourth Proportional to 1,016.50, 1,403.25 and 980.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.50 : 1,403.25 = 980.02 : x
2. Step 2: Convert to fraction form
   1,016.50/1,403.25 = 980.02/x
3. Step 3: Cross multiply
   1,016.50x = 1,403.25 × 980.02
4. Step 4: Simplify right side
   1,016.50x = 1,375,213.07
5. Step 5: Solve for x
   x = 1,375,213.07/1,016.50
6. Step 6: Final answer
   x = 1,352.89