Finding the Fourth Proportional to 2,638.89, 3,642.12 and 1,519.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.89 : 3,642.12 = 1,519.63 : x
2. Step 2: Convert to fraction form
   2,638.89/3,642.12 = 1,519.63/x
3. Step 3: Cross multiply
   2,638.89x = 3,642.12 × 1,519.63
4. Step 4: Simplify right side
   2,638.89x = 5,534,665.71
5. Step 5: Solve for x
   x = 5,534,665.71/2,638.89
6. Step 6: Final answer
   x = 2,097.35