Finding the Fourth Proportional to 2,638.88, 3,635.52 and 2,196.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.88 : 3,635.52 = 2,196.08 : x
2. Step 2: Convert to fraction form
   2,638.88/3,635.52 = 2,196.08/x
3. Step 3: Cross multiply
   2,638.88x = 3,635.52 × 2,196.08
4. Step 4: Simplify right side
   2,638.88x = 7,983,892.76
5. Step 5: Solve for x
   x = 7,983,892.76/2,638.88
6. Step 6: Final answer
   x = 3,025.49