Finding the Fourth Proportional to 1,016.20, 1,402.39 and 574.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.20 : 1,402.39 = 574.15 : x
2. Step 2: Convert to fraction form
   1,016.20/1,402.39 = 574.15/x
3. Step 3: Cross multiply
   1,016.20x = 1,402.39 × 574.15
4. Step 4: Simplify right side
   1,016.20x = 805,173.77
5. Step 5: Solve for x
   x = 805,173.77/1,016.20
6. Step 6: Final answer
   x = 792.34