Finding the Fourth Proportional to 1,008.51, 1,391.88 and 566.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.51 : 1,391.88 = 566.52 : x
2. Step 2: Convert to fraction form
   1,008.51/1,391.88 = 566.52/x
3. Step 3: Cross multiply
   1,008.51x = 1,391.88 × 566.52
4. Step 4: Simplify right side
   1,008.51x = 788,527.86
5. Step 5: Solve for x
   x = 788,527.86/1,008.51
6. Step 6: Final answer
   x = 781.87