Finding the Fourth Proportional to 6,469.86, 8,928.72 and 3,638.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,469.86 : 8,928.72 = 3,638.12 : x
2. Step 2: Convert to fraction form
   6,469.86/8,928.72 = 3,638.12/x
3. Step 3: Cross multiply
   6,469.86x = 8,928.72 × 3,638.12
4. Step 4: Simplify right side
   6,469.86x = 32,483,754.08
5. Step 5: Solve for x
   x = 32,483,754.08/6,469.86
6. Step 6: Final answer
   x = 5,020.79