Finding the Fourth Proportional to 8,418.72, 12,628.61 and 3,488.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,418.72 : 12,628.61 = 3,488.75 : x
2. Step 2: Convert to fraction form
   8,418.72/12,628.61 = 3,488.75/x
3. Step 3: Cross multiply
   8,418.72x = 12,628.61 × 3,488.75
4. Step 4: Simplify right side
   8,418.72x = 44,057,982.55
5. Step 5: Solve for x
   x = 44,057,982.55/8,418.72
6. Step 6: Final answer
   x = 5,233.34