Finding the Fourth Proportional to 1,641.65, 2,264.34 and 1,144.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.65 : 2,264.34 = 1,144.10 : x
2. Step 2: Convert to fraction form
   1,641.65/2,264.34 = 1,144.10/x
3. Step 3: Cross multiply
   1,641.65x = 2,264.34 × 1,144.10
4. Step 4: Simplify right side
   1,641.65x = 2,590,631.39
5. Step 5: Solve for x
   x = 2,590,631.39/1,641.65
6. Step 6: Final answer
   x = 1,578.07