Finding the Fourth Proportional to 8,820.72, 13,215.78 and 5,350.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820.72 : 13,215.78 = 5,350.68 : x
2. Step 2: Convert to fraction form
   8,820.72/13,215.78 = 5,350.68/x
3. Step 3: Cross multiply
   8,820.72x = 13,215.78 × 5,350.68
4. Step 4: Simplify right side
   8,820.72x = 70,713,409.73
5. Step 5: Solve for x
   x = 70,713,409.73/8,820.72
6. Step 6: Final answer
   x = 8,016.74