Finding the Fourth Proportional to 1,443.78, 2,164.38 and 1,031.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.78 : 2,164.38 = 1,031.88 : x
2. Step 2: Convert to fraction form
   1,443.78/2,164.38 = 1,031.88/x
3. Step 3: Cross multiply
   1,443.78x = 2,164.38 × 1,031.88
4. Step 4: Simplify right side
   1,443.78x = 2,233,380.43
5. Step 5: Solve for x
   x = 2,233,380.43/1,443.78
6. Step 6: Final answer
   x = 1,546.90