Finding the Fourth Proportional to 1,965.16, 2,711.89 and 1,080.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.16 : 2,711.89 = 1,080.91 : x
2. Step 2: Convert to fraction form
   1,965.16/2,711.89 = 1,080.91/x
3. Step 3: Cross multiply
   1,965.16x = 2,711.89 × 1,080.91
4. Step 4: Simplify right side
   1,965.16x = 2,931,290.06
5. Step 5: Solve for x
   x = 2,931,290.06/1,965.16
6. Step 6: Final answer
   x = 1,491.63