Finding the Fourth Proportional to 1,870.35, 2,581.10 and 1,031.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.35 : 2,581.10 = 1,031.09 : x
2. Step 2: Convert to fraction form
   1,870.35/2,581.10 = 1,031.09/x
3. Step 3: Cross multiply
   1,870.35x = 2,581.10 × 1,031.09
4. Step 4: Simplify right side
   1,870.35x = 2,661,328.34
5. Step 5: Solve for x
   x = 2,661,328.34/1,870.35
6. Step 6: Final answer
   x = 1,422.91