Finding the Fourth Proportional to 8,812.72, 12,162.54 and 5,628.97

Step by Step Solution

1. Step 1: Write the proportion equation
   8,812.72 : 12,162.54 = 5,628.97 : x
2. Step 2: Convert to fraction form
   8,812.72/12,162.54 = 5,628.97/x
3. Step 3: Cross multiply
   8,812.72x = 12,162.54 × 5,628.97
4. Step 4: Simplify right side
   8,812.72x = 68,462,572.78
5. Step 5: Solve for x
   x = 68,462,572.78/8,812.72
6. Step 6: Final answer
   x = 7,768.61