Finding the Fourth Proportional to 2,627.71, 3,920.04 and 2,556.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,627.71 : 3,920.04 = 2,556.21 : x
2. Step 2: Convert to fraction form
   2,627.71/3,920.04 = 2,556.21/x
3. Step 3: Cross multiply
   2,627.71x = 3,920.04 × 2,556.21
4. Step 4: Simplify right side
   2,627.71x = 10,020,430.91
5. Step 5: Solve for x
   x = 10,020,430.91/2,627.71
6. Step 6: Final answer
   x = 3,813.37