Finding the Fourth Proportional to 2,108.48, 2,908.49 and 1,321.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.48 : 2,908.49 = 1,321.16 : x
2. Step 2: Convert to fraction form
   2,108.48/2,908.49 = 1,321.16/x
3. Step 3: Cross multiply
   2,108.48x = 2,908.49 × 1,321.16
4. Step 4: Simplify right side
   2,108.48x = 3,842,559.50
5. Step 5: Solve for x
   x = 3,842,559.50/2,108.48
6. Step 6: Final answer
   x = 1,822.44