Finding the Fourth Proportional to 2,076.40, 2,865.38 and 1,144.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.40 : 2,865.38 = 1,144.88 : x
2. Step 2: Convert to fraction form
   2,076.40/2,865.38 = 1,144.88/x
3. Step 3: Cross multiply
   2,076.40x = 2,865.38 × 1,144.88
4. Step 4: Simplify right side
   2,076.40x = 3,280,516.25
5. Step 5: Solve for x
   x = 3,280,516.25/2,076.40
6. Step 6: Final answer
   x = 1,579.91