Finding the Fourth Proportional to 1,870.43, 2,581.18 and 1,031.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.43 : 2,581.18 = 1,031.21 : x
2. Step 2: Convert to fraction form
   1,870.43/2,581.18 = 1,031.21/x
3. Step 3: Cross multiply
   1,870.43x = 2,581.18 × 1,031.21
4. Step 4: Simplify right side
   1,870.43x = 2,661,738.63
5. Step 5: Solve for x
   x = 2,661,738.63/1,870.43
6. Step 6: Final answer
   x = 1,423.06