Finding the Fourth Proportional to 1,889.72, 2,608.05 and 1,143.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,889.72 : 2,608.05 = 1,143.94 : x
2. Step 2: Convert to fraction form
   1,889.72/2,608.05 = 1,143.94/x
3. Step 3: Cross multiply
   1,889.72x = 2,608.05 × 1,143.94
4. Step 4: Simplify right side
   1,889.72x = 2,983,448.94
5. Step 5: Solve for x
   x = 2,983,448.94/1,889.72
6. Step 6: Final answer
   x = 1,578.78