Finding the Fourth Proportional to 1,008.60, 1,391.83 and 566.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,008.60 : 1,391.83 = 566.52 : x
2. Step 2: Convert to fraction form
   1,008.60/1,391.83 = 566.52/x
3. Step 3: Cross multiply
   1,008.60x = 1,391.83 × 566.52
4. Step 4: Simplify right side
   1,008.60x = 788,499.53
5. Step 5: Solve for x
   x = 788,499.53/1,008.60
6. Step 6: Final answer
   x = 781.78