Finding the Fourth Proportional to 8,155.72, 12,237.82 and 4,457.28

Step by Step Solution

1. Step 1: Write the proportion equation
   8,155.72 : 12,237.82 = 4,457.28 : x
2. Step 2: Convert to fraction form
   8,155.72/12,237.82 = 4,457.28/x
3. Step 3: Cross multiply
   8,155.72x = 12,237.82 × 4,457.28
4. Step 4: Simplify right side
   8,155.72x = 54,547,390.33
5. Step 5: Solve for x
   x = 54,547,390.33/8,155.72
6. Step 6: Final answer
   x = 6,688.24