Finding the Fourth Proportional to 1,665.74, 2,498.62 and 570.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,665.74 : 2,498.62 = 570.12 : x
2. Step 2: Convert to fraction form
   1,665.74/2,498.62 = 570.12/x
3. Step 3: Cross multiply
   1,665.74x = 2,498.62 × 570.12
4. Step 4: Simplify right side
   1,665.74x = 1,424,513.23
5. Step 5: Solve for x
   x = 1,424,513.23/1,665.74
6. Step 6: Final answer
   x = 855.18