Finding the Fourth Proportional to 1,016.48, 1,402.74 and 574.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.48 : 1,402.74 = 574.40 : x
2. Step 2: Convert to fraction form
   1,016.48/1,402.74 = 574.40/x
3. Step 3: Cross multiply
   1,016.48x = 1,402.74 × 574.40
4. Step 4: Simplify right side
   1,016.48x = 805,733.86
5. Step 5: Solve for x
   x = 805,733.86/1,016.48
6. Step 6: Final answer
   x = 792.67