Finding the Fourth Proportional to 2,108.13, 2,908.76 and 1,223.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.13 : 2,908.76 = 1,223.42 : x
2. Step 2: Convert to fraction form
   2,108.13/2,908.76 = 1,223.42/x
3. Step 3: Cross multiply
   2,108.13x = 2,908.76 × 1,223.42
4. Step 4: Simplify right side
   2,108.13x = 3,558,629.04
5. Step 5: Solve for x
   x = 3,558,629.04/2,108.13
6. Step 6: Final answer
   x = 1,688.05