Finding the Fourth Proportional to 2,147.69, 2,964.53 and 1,308.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,147.69 : 2,964.53 = 1,308.94 : x
2. Step 2: Convert to fraction form
   2,147.69/2,964.53 = 1,308.94/x
3. Step 3: Cross multiply
   2,147.69x = 2,964.53 × 1,308.94
4. Step 4: Simplify right side
   2,147.69x = 3,880,391.90
5. Step 5: Solve for x
   x = 3,880,391.90/2,147.69
6. Step 6: Final answer
   x = 1,806.77