Finding the Fourth Proportional to 3,819.54, 5,271.24 and 2,638.56

Step by Step Solution

1. Step 1: Write the proportion equation
   3,819.54 : 5,271.24 = 2,638.56 : x
2. Step 2: Convert to fraction form
   3,819.54/5,271.24 = 2,638.56/x
3. Step 3: Cross multiply
   3,819.54x = 5,271.24 × 2,638.56
4. Step 4: Simplify right side
   3,819.54x = 13,908,483.01
5. Step 5: Solve for x
   x = 13,908,483.01/3,819.54
6. Step 6: Final answer
   x = 3,641.40