Finding the Fourth Proportional to 1,964.10, 2,711.72 and 1,218.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.10 : 2,711.72 = 1,218.84 : x
2. Step 2: Convert to fraction form
   1,964.10/2,711.72 = 1,218.84/x
3. Step 3: Cross multiply
   1,964.10x = 2,711.72 × 1,218.84
4. Step 4: Simplify right side
   1,964.10x = 3,305,146.71
5. Step 5: Solve for x
   x = 3,305,146.71/1,964.10
6. Step 6: Final answer
   x = 1,682.78