Finding the Fourth Proportional to 1,965.69, 2,960.17 and 1,421.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,965.69 : 2,960.17 = 1,421.69 : x
2. Step 2: Convert to fraction form
   1,965.69/2,960.17 = 1,421.69/x
3. Step 3: Cross multiply
   1,965.69x = 2,960.17 × 1,421.69
4. Step 4: Simplify right side
   1,965.69x = 4,208,425.73
5. Step 5: Solve for x
   x = 4,208,425.73/1,965.69
6. Step 6: Final answer
   x = 2,140.94