Finding the Fourth Proportional to 1,969.88, 2,718.56 and 1,085.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.88 : 2,718.56 = 1,085.69 : x
2. Step 2: Convert to fraction form
   1,969.88/2,718.56 = 1,085.69/x
3. Step 3: Cross multiply
   1,969.88x = 2,718.56 × 1,085.69
4. Step 4: Simplify right side
   1,969.88x = 2,951,502.53
5. Step 5: Solve for x
   x = 2,951,502.53/1,969.88
6. Step 6: Final answer
   x = 1,498.31