Finding the Fourth Proportional to 1,008.59, 1,391.92 and 566.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.59 : 1,391.92 = 566.60 : x
2. Step 2: Convert to fraction form
   1,008.59/1,391.92 = 566.60/x
3. Step 3: Cross multiply
   1,008.59x = 1,391.92 × 566.60
4. Step 4: Simplify right side
   1,008.59x = 788,653.50
5. Step 5: Solve for x
   x = 788,653.50/1,008.59
6. Step 6: Final answer
   x = 781.94