Finding the Fourth Proportional to 2,188.85, 3,021.37 and 1,859.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,188.85 : 3,021.37 = 1,859.18 : x
2. Step 2: Convert to fraction form
   2,188.85/3,021.37 = 1,859.18/x
3. Step 3: Cross multiply
   2,188.85x = 3,021.37 × 1,859.18
4. Step 4: Simplify right side
   2,188.85x = 5,617,250.92
5. Step 5: Solve for x
   x = 5,617,250.92/2,188.85
6. Step 6: Final answer
   x = 2,566.31