Finding the Fourth Proportional to 1,889.32, 2,607.78 and 1,143.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,889.32 : 2,607.78 = 1,143.16 : x
2. Step 2: Convert to fraction form
   1,889.32/2,607.78 = 1,143.16/x
3. Step 3: Cross multiply
   1,889.32x = 2,607.78 × 1,143.16
4. Step 4: Simplify right side
   1,889.32x = 2,981,109.78
5. Step 5: Solve for x
   x = 2,981,109.78/1,889.32
6. Step 6: Final answer
   x = 1,577.87