Finding the Fourth Proportional to 1,870.56, 2,581.43 and 1,031.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.56 : 2,581.43 = 1,031.31 : x
2. Step 2: Convert to fraction form
   1,870.56/2,581.43 = 1,031.31/x
3. Step 3: Cross multiply
   1,870.56x = 2,581.43 × 1,031.31
4. Step 4: Simplify right side
   1,870.56x = 2,662,249.42
5. Step 5: Solve for x
   x = 2,662,249.42/1,870.56
6. Step 6: Final answer
   x = 1,423.24