Finding the Fourth Proportional to 6,421.72, 8,862.06 and 3,627.28

Step by Step Solution

1. Step 1: Write the proportion equation
   6,421.72 : 8,862.06 = 3,627.28 : x
2. Step 2: Convert to fraction form
   6,421.72/8,862.06 = 3,627.28/x
3. Step 3: Cross multiply
   6,421.72x = 8,862.06 × 3,627.28
4. Step 4: Simplify right side
   6,421.72x = 32,145,173.00
5. Step 5: Solve for x
   x = 32,145,173.00/6,421.72
6. Step 6: Final answer
   x = 5,005.70