Finding the Fourth Proportional to 10,047.72, 13,872.36 and 6,464.28

Step by Step Solution

1. Step 1: Write the proportion equation
   10,047.72 : 13,872.36 = 6,464.28 : x
2. Step 2: Convert to fraction form
   10,047.72/13,872.36 = 6,464.28/x
3. Step 3: Cross multiply
   10,047.72x = 13,872.36 × 6,464.28
4. Step 4: Simplify right side
   10,047.72x = 89,674,819.30
5. Step 5: Solve for x
   x = 89,674,819.30/10,047.72
6. Step 6: Final answer
   x = 8,924.89