Finding the Fourth Proportional to 3,870.22, 5,338.83 and 2,689.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,870.22 : 5,338.83 = 2,689.24 : x
2. Step 2: Convert to fraction form
   3,870.22/5,338.83 = 2,689.24/x
3. Step 3: Cross multiply
   3,870.22x = 5,338.83 × 2,689.24
4. Step 4: Simplify right side
   3,870.22x = 14,357,395.19
5. Step 5: Solve for x
   x = 14,357,395.19/3,870.22
6. Step 6: Final answer
   x = 3,709.71