Finding the Fourth Proportional to 2,587.90, 3,568.62 and 2,216.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.90 : 3,568.62 = 2,216.12 : x
2. Step 2: Convert to fraction form
   2,587.90/3,568.62 = 2,216.12/x
3. Step 3: Cross multiply
   2,587.90x = 3,568.62 × 2,216.12
4. Step 4: Simplify right side
   2,587.90x = 7,908,490.15
5. Step 5: Solve for x
   x = 7,908,490.15/2,587.90
6. Step 6: Final answer
   x = 3,055.95