Finding the Fourth Proportional to 2,107.52, 2,908.50 and 1,223.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,107.52 : 2,908.50 = 1,223.39 : x
2. Step 2: Convert to fraction form
   2,107.52/2,908.50 = 1,223.39/x
3. Step 3: Cross multiply
   2,107.52x = 2,908.50 × 1,223.39
4. Step 4: Simplify right side
   2,107.52x = 3,558,229.82
5. Step 5: Solve for x
   x = 3,558,229.82/2,107.52
6. Step 6: Final answer
   x = 1,688.35