Finding the Fourth Proportional to 1,009.27, 1,392.82 and 567.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.27 : 1,392.82 = 567.21 : x
2. Step 2: Convert to fraction form
   1,009.27/1,392.82 = 567.21/x
3. Step 3: Cross multiply
   1,009.27x = 1,392.82 × 567.21
4. Step 4: Simplify right side
   1,009.27x = 790,021.43
5. Step 5: Solve for x
   x = 790,021.43/1,009.27
6. Step 6: Final answer
   x = 782.77