Finding the Fourth Proportional to 1,040.86, 1,436.30 and 568.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,040.86 : 1,436.30 = 568.72 : x
2. Step 2: Convert to fraction form
   1,040.86/1,436.30 = 568.72/x
3. Step 3: Cross multiply
   1,040.86x = 1,436.30 × 568.72
4. Step 4: Simplify right side
   1,040.86x = 816,845.35
5. Step 5: Solve for x
   x = 816,845.35/1,040.86
6. Step 6: Final answer
   x = 784.78