Finding the Fourth Proportional to 2,587.50, 3,874.16 and 1,808.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587.50 : 3,874.16 = 1,808.28 : x
2. Step 2: Convert to fraction form
   2,587.50/3,874.16 = 1,808.28/x
3. Step 3: Cross multiply
   2,587.50x = 3,874.16 × 1,808.28
4. Step 4: Simplify right side
   2,587.50x = 7,005,570.57
5. Step 5: Solve for x
   x = 7,005,570.57/2,587.50
6. Step 6: Final answer
   x = 2,707.47