Finding the Fourth Proportional to 5,406.24, 8,105.04 and 2,118.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,406.24 : 8,105.04 = 2,118.72 : x
2. Step 2: Convert to fraction form
   5,406.24/8,105.04 = 2,118.72/x
3. Step 3: Cross multiply
   5,406.24x = 8,105.04 × 2,118.72
4. Step 4: Simplify right side
   5,406.24x = 17,172,310.35
5. Step 5: Solve for x
   x = 17,172,310.35/5,406.24
6. Step 6: Final answer
   x = 3,176.39