Finding the Fourth Proportional to 2,008.74, 3,008.51 and 1,690.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,008.74 : 3,008.51 = 1,690.68 : x
2. Step 2: Convert to fraction form
   2,008.74/3,008.51 = 1,690.68/x
3. Step 3: Cross multiply
   2,008.74x = 3,008.51 × 1,690.68
4. Step 4: Simplify right side
   2,008.74x = 5,086,427.69
5. Step 5: Solve for x
   x = 5,086,427.69/2,008.74
6. Step 6: Final answer
   x = 2,532.15