Finding the Fourth Proportional to 1,891.10, 2,609.76 and 1,144.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.10 : 2,609.76 = 1,144.91 : x
2. Step 2: Convert to fraction form
   1,891.10/2,609.76 = 1,144.91/x
3. Step 3: Cross multiply
   1,891.10x = 2,609.76 × 1,144.91
4. Step 4: Simplify right side
   1,891.10x = 2,987,940.32
5. Step 5: Solve for x
   x = 2,987,940.32/1,891.10
6. Step 6: Final answer
   x = 1,580.00