Finding the Fourth Proportional to 1,448.69, 2,168.37 and 1,321.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,448.69 : 2,168.37 = 1,321.11 : x
2. Step 2: Convert to fraction form
   1,448.69/2,168.37 = 1,321.11/x
3. Step 3: Cross multiply
   1,448.69x = 2,168.37 × 1,321.11
4. Step 4: Simplify right side
   1,448.69x = 2,864,655.29
5. Step 5: Solve for x
   x = 2,864,655.29/1,448.69
6. Step 6: Final answer
   x = 1,977.42