Finding the Fourth Proportional to 2,639.03, 3,930.47 and 2,566.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.03 : 3,930.47 = 2,566.38 : x
2. Step 2: Convert to fraction form
   2,639.03/3,930.47 = 2,566.38/x
3. Step 3: Cross multiply
   2,639.03x = 3,930.47 × 2,566.38
4. Step 4: Simplify right side
   2,639.03x = 10,087,105.57
5. Step 5: Solve for x
   x = 10,087,105.57/2,639.03
6. Step 6: Final answer
   x = 3,822.28