Finding the Fourth Proportional to 1,871.02, 2,581.89 and 1,031.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.02 : 2,581.89 = 1,031.56 : x
2. Step 2: Convert to fraction form
   1,871.02/2,581.89 = 1,031.56/x
3. Step 3: Cross multiply
   1,871.02x = 2,581.89 × 1,031.56
4. Step 4: Simplify right side
   1,871.02x = 2,663,374.45
5. Step 5: Solve for x
   x = 2,663,374.45/1,871.02
6. Step 6: Final answer
   x = 1,423.49