Finding the Fourth Proportional to 2,889.57, 3,987.59 and 2,260.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,889.57 : 3,987.59 = 2,260.74 : x
2. Step 2: Convert to fraction form
   2,889.57/3,987.59 = 2,260.74/x
3. Step 3: Cross multiply
   2,889.57x = 3,987.59 × 2,260.74
4. Step 4: Simplify right side
   2,889.57x = 9,014,892.91
5. Step 5: Solve for x
   x = 9,014,892.91/2,889.57
6. Step 6: Final answer
   x = 3,119.80