Finding the Fourth Proportional to 8,928.29, 12,320.56 and 5,151.23

Step by Step Solution

1. Step 1: Write the proportion equation
   8,928.29 : 12,320.56 = 5,151.23 : x
2. Step 2: Convert to fraction form
   8,928.29/12,320.56 = 5,151.23/x
3. Step 3: Cross multiply
   8,928.29x = 12,320.56 × 5,151.23
4. Step 4: Simplify right side
   8,928.29x = 63,466,012.53
5. Step 5: Solve for x
   x = 63,466,012.53/8,928.29
6. Step 6: Final answer
   x = 7,108.42