Finding the Fourth Proportional to 1,870.74, 2,581.50 and 1,031.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.74 : 2,581.50 = 1,031.39 : x
2. Step 2: Convert to fraction form
   1,870.74/2,581.50 = 1,031.39/x
3. Step 3: Cross multiply
   1,870.74x = 2,581.50 × 1,031.39
4. Step 4: Simplify right side
   1,870.74x = 2,662,534.58
5. Step 5: Solve for x
   x = 2,662,534.58/1,870.74
6. Step 6: Final answer
   x = 1,423.26