Finding the Fourth Proportional to 1,002.39, 1,502.56 and 568.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.39 : 1,502.56 = 568.63 : x
2. Step 2: Convert to fraction form
   1,002.39/1,502.56 = 568.63/x
3. Step 3: Cross multiply
   1,002.39x = 1,502.56 × 568.63
4. Step 4: Simplify right side
   1,002.39x = 854,400.69
5. Step 5: Solve for x
   x = 854,400.69/1,002.39
6. Step 6: Final answer
   x = 852.36