Finding the Fourth Proportional to 3,878.99, 5,352.89 and 2,200.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,878.99 : 5,352.89 = 2,200.55 : x
2. Step 2: Convert to fraction form
   3,878.99/5,352.89 = 2,200.55/x
3. Step 3: Cross multiply
   3,878.99x = 5,352.89 × 2,200.55
4. Step 4: Simplify right side
   3,878.99x = 11,779,264.32
5. Step 5: Solve for x
   x = 11,779,264.32/3,878.99
6. Step 6: Final answer
   x = 3,036.68