Finding the Fourth Proportional to 1,870.66, 2,581.40 and 1,031.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.66 : 2,581.40 = 1,031.33 : x
2. Step 2: Convert to fraction form
   1,870.66/2,581.40 = 1,031.33/x
3. Step 3: Cross multiply
   1,870.66x = 2,581.40 × 1,031.33
4. Step 4: Simplify right side
   1,870.66x = 2,662,284.29
5. Step 5: Solve for x
   x = 2,662,284.29/1,870.66
6. Step 6: Final answer
   x = 1,423.18