Finding the Fourth Proportional to 1,964.89, 2,711.21 and 1,178.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,964.89 : 2,711.21 = 1,178.96 : x
2. Step 2: Convert to fraction form
   1,964.89/2,711.21 = 1,178.96/x
3. Step 3: Cross multiply
   1,964.89x = 2,711.21 × 1,178.96
4. Step 4: Simplify right side
   1,964.89x = 3,196,388.69
5. Step 5: Solve for x
   x = 3,196,388.69/1,964.89
6. Step 6: Final answer
   x = 1,626.75