Finding the Fourth Proportional to 2,122.83, 2,929.39 and 1,238.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.83 : 2,929.39 = 1,238.49 : x
2. Step 2: Convert to fraction form
   2,122.83/2,929.39 = 1,238.49/x
3. Step 3: Cross multiply
   2,122.83x = 2,929.39 × 1,238.49
4. Step 4: Simplify right side
   2,122.83x = 3,628,020.22
5. Step 5: Solve for x
   x = 3,628,020.22/2,122.83
6. Step 6: Final answer
   x = 1,709.05