Finding the Fourth Proportional to 1,870.76, 2,581.71 and 1,031.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.76 : 2,581.71 = 1,031.55 : x
2. Step 2: Convert to fraction form
   1,870.76/2,581.71 = 1,031.55/x
3. Step 3: Cross multiply
   1,870.76x = 2,581.71 × 1,031.55
4. Step 4: Simplify right side
   1,870.76x = 2,663,144.88
5. Step 5: Solve for x
   x = 2,663,144.88/1,870.76
6. Step 6: Final answer
   x = 1,423.57