Finding the Fourth Proportional to 1,964.72, 2,711.31 and 1,080.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.72 : 2,711.31 = 1,080.47 : x
2. Step 2: Convert to fraction form
   1,964.72/2,711.31 = 1,080.47/x
3. Step 3: Cross multiply
   1,964.72x = 2,711.31 × 1,080.47
4. Step 4: Simplify right side
   1,964.72x = 2,929,491.84
5. Step 5: Solve for x
   x = 2,929,491.84/1,964.72
6. Step 6: Final answer
   x = 1,491.05