Finding the Fourth Proportional to 2,162.10, 3,234.22 and 1,638.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,162.10 : 3,234.22 = 1,638.16 : x
2. Step 2: Convert to fraction form
   2,162.10/3,234.22 = 1,638.16/x
3. Step 3: Cross multiply
   2,162.10x = 3,234.22 × 1,638.16
4. Step 4: Simplify right side
   2,162.10x = 5,298,169.84
5. Step 5: Solve for x
   x = 5,298,169.84/2,162.10
6. Step 6: Final answer
   x = 2,450.47