Finding the Fourth Proportional to 1,867.71, 2,576.82 and 1,081.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.71 : 2,576.82 = 1,081.20 : x
2. Step 2: Convert to fraction form
   1,867.71/2,576.82 = 1,081.20/x
3. Step 3: Cross multiply
   1,867.71x = 2,576.82 × 1,081.20
4. Step 4: Simplify right side
   1,867.71x = 2,786,071.50
5. Step 5: Solve for x
   x = 2,786,071.50/1,867.71
6. Step 6: Final answer
   x = 1,491.70