Finding the Fourth Proportional to 1,969.40, 2,717.87 and 1,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969.40 : 2,717.87 = 1,118.72 : x
2. Step 2: Convert to fraction form
   1,969.40/2,717.87 = 1,118.72/x
3. Step 3: Cross multiply
   1,969.40x = 2,717.87 × 1,118.72
4. Step 4: Simplify right side
   1,969.40x = 3,040,535.53
5. Step 5: Solve for x
   x = 3,040,535.53/1,969.40
6. Step 6: Final answer
   x = 1,543.89