Finding the Fourth Proportional to 8,928.09, 12,320.78 and 5,151.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,928.09 : 12,320.78 = 5,151.24 : x
2. Step 2: Convert to fraction form
   8,928.09/12,320.78 = 5,151.24/x
3. Step 3: Cross multiply
   8,928.09x = 12,320.78 × 5,151.24
4. Step 4: Simplify right side
   8,928.09x = 63,467,269.01
5. Step 5: Solve for x
   x = 63,467,269.01/8,928.09
6. Step 6: Final answer
   x = 7,108.72