Finding the Fourth Proportional to 1,665.98, 2,498.82 and 570.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.98 : 2,498.82 = 570.20 : x
2. Step 2: Convert to fraction form
   1,665.98/2,498.82 = 570.20/x
3. Step 3: Cross multiply
   1,665.98x = 2,498.82 × 570.20
4. Step 4: Simplify right side
   1,665.98x = 1,424,827.16
5. Step 5: Solve for x
   x = 1,424,827.16/1,665.98
6. Step 6: Final answer
   x = 855.25