Finding the Fourth Proportional to 2,016.16, 3,018.96 and 1,690.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,016.16 : 3,018.96 = 1,690.72 : x
2. Step 2: Convert to fraction form
   2,016.16/3,018.96 = 1,690.72/x
3. Step 3: Cross multiply
   2,016.16x = 3,018.96 × 1,690.72
4. Step 4: Simplify right side
   2,016.16x = 5,104,216.05
5. Step 5: Solve for x
   x = 5,104,216.05/2,016.16
6. Step 6: Final answer
   x = 2,531.65