Finding the Fourth Proportional to 1,965.03, 2,711.06 and 1,218.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.03 : 2,711.06 = 1,218.72 : x
2. Step 2: Convert to fraction form
   1,965.03/2,711.06 = 1,218.72/x
3. Step 3: Cross multiply
   1,965.03x = 2,711.06 × 1,218.72
4. Step 4: Simplify right side
   1,965.03x = 3,304,023.04
5. Step 5: Solve for x
   x = 3,304,023.04/1,965.03
6. Step 6: Final answer
   x = 1,681.41