Finding the Fourth Proportional to 1,015.43, 1,401.25 and 567.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.43 : 1,401.25 = 567.31 : x
2. Step 2: Convert to fraction form
   1,015.43/1,401.25 = 567.31/x
3. Step 3: Cross multiply
   1,015.43x = 1,401.25 × 567.31
4. Step 4: Simplify right side
   1,015.43x = 794,943.14
5. Step 5: Solve for x
   x = 794,943.14/1,015.43
6. Step 6: Final answer
   x = 782.86