Finding the Fourth Proportional to 1,866.66, 2,575.98 and 1,080.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,866.66 : 2,575.98 = 1,080.69 : x
2. Step 2: Convert to fraction form
   1,866.66/2,575.98 = 1,080.69/x
3. Step 3: Cross multiply
   1,866.66x = 2,575.98 × 1,080.69
4. Step 4: Simplify right side
   1,866.66x = 2,783,835.83
5. Step 5: Solve for x
   x = 2,783,835.83/1,866.66
6. Step 6: Final answer
   x = 1,491.35