Finding the Fourth Proportional to 1,870.30, 2,581.17 and 1,031.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.30 : 2,581.17 = 1,031.18 : x
2. Step 2: Convert to fraction form
   1,870.30/2,581.17 = 1,031.18/x
3. Step 3: Cross multiply
   1,870.30x = 2,581.17 × 1,031.18
4. Step 4: Simplify right side
   1,870.30x = 2,661,634.11
5. Step 5: Solve for x
   x = 2,661,634.11/1,870.30
6. Step 6: Final answer
   x = 1,423.10