Finding the Fourth Proportional to 1,870.34, 2,581.11 and 1,031.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.34 : 2,581.11 = 1,031.06 : x
2. Step 2: Convert to fraction form
   1,870.34/2,581.11 = 1,031.06/x
3. Step 3: Cross multiply
   1,870.34x = 2,581.11 × 1,031.06
4. Step 4: Simplify right side
   1,870.34x = 2,661,285.73
5. Step 5: Solve for x
   x = 2,661,285.73/1,870.34
6. Step 6: Final answer
   x = 1,422.89