Finding the Fourth Proportional to 2,633.22, 3,635.55 and 1,638.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,633.22 : 3,635.55 = 1,638.90 : x
2. Step 2: Convert to fraction form
   2,633.22/3,635.55 = 1,638.90/x
3. Step 3: Cross multiply
   2,633.22x = 3,635.55 × 1,638.90
4. Step 4: Simplify right side
   2,633.22x = 5,958,302.90
5. Step 5: Solve for x
   x = 5,958,302.90/2,633.22
6. Step 6: Final answer
   x = 2,262.74