Finding the Fourth Proportional to 8,924.62, 12,315.78 and 4,945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,924.62 : 12,315.78 = 4,945.72 : x
2. Step 2: Convert to fraction form
   8,924.62/12,315.78 = 4,945.72/x
3. Step 3: Cross multiply
   8,924.62x = 12,315.78 × 4,945.72
4. Step 4: Simplify right side
   8,924.62x = 60,910,399.46
5. Step 5: Solve for x
   x = 60,910,399.46/8,924.62
6. Step 6: Final answer
   x = 6,824.99