Finding the Fourth Proportional to 1,638.33, 2,246.16 and 1,608.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,638.33 : 2,246.16 = 1,608.72 : x
2. Step 2: Convert to fraction form
   1,638.33/2,246.16 = 1,608.72/x
3. Step 3: Cross multiply
   1,638.33x = 2,246.16 × 1,608.72
4. Step 4: Simplify right side
   1,638.33x = 3,613,442.52
5. Step 5: Solve for x
   x = 3,613,442.52/1,638.33
6. Step 6: Final answer
   x = 2,205.56