Finding the Fourth Proportional to 2,685.52, 4,024.64 and 2,606.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,685.52 : 4,024.64 = 2,606.72 : x
2. Step 2: Convert to fraction form
   2,685.52/4,024.64 = 2,606.72/x
3. Step 3: Cross multiply
   2,685.52x = 4,024.64 × 2,606.72
4. Step 4: Simplify right side
   2,685.52x = 10,491,109.58
5. Step 5: Solve for x
   x = 10,491,109.58/2,685.52
6. Step 6: Final answer
   x = 3,906.55