Finding the Fourth Proportional to 2,174.31, 3,233.49 and 2,105.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,174.31 : 3,233.49 = 2,105.12 : x
2. Step 2: Convert to fraction form
   2,174.31/3,233.49 = 2,105.12/x
3. Step 3: Cross multiply
   2,174.31x = 3,233.49 × 2,105.12
4. Step 4: Simplify right side
   2,174.31x = 6,806,868.30
5. Step 5: Solve for x
   x = 6,806,868.30/2,174.31
6. Step 6: Final answer
   x = 3,130.59