Finding the Fourth Proportional to 1,009.41, 1,392.98 and 567.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.41 : 1,392.98 = 567.31 : x
2. Step 2: Convert to fraction form
   1,009.41/1,392.98 = 567.31/x
3. Step 3: Cross multiply
   1,009.41x = 1,392.98 × 567.31
4. Step 4: Simplify right side
   1,009.41x = 790,251.48
5. Step 5: Solve for x
   x = 790,251.48/1,009.41
6. Step 6: Final answer
   x = 782.88