Finding the Fourth Proportional to 1,867.60, 2,576.72 and 1,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,867.60 : 2,576.72 = 1,081.50 : x
2. Step 2: Convert to fraction form
   1,867.60/2,576.72 = 1,081.50/x
3. Step 3: Cross multiply
   1,867.60x = 2,576.72 × 1,081.50
4. Step 4: Simplify right side
   1,867.60x = 2,786,709.80
5. Step 5: Solve for x
   x = 2,786,709.80/1,867.60
6. Step 6: Final answer
   x = 1,492.13