Finding the Fourth Proportional to 1,016.21, 1,402.38 and 574.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,016.21 : 1,402.38 = 574.12 : x
2. Step 2: Convert to fraction form
   1,016.21/1,402.38 = 574.12/x
3. Step 3: Cross multiply
   1,016.21x = 1,402.38 × 574.12
4. Step 4: Simplify right side
   1,016.21x = 805,136.16
5. Step 5: Solve for x
   x = 805,136.16/1,016.21
6. Step 6: Final answer
   x = 792.29