Finding the Fourth Proportional to 10,162.05, 14,028.72 and 6,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,162.05 : 14,028.72 = 6,390.69 : x
2. Step 2: Convert to fraction form
   10,162.05/14,028.72 = 6,390.69/x
3. Step 3: Cross multiply
   10,162.05x = 14,028.72 × 6,390.69
4. Step 4: Simplify right side
   10,162.05x = 89,653,200.62
5. Step 5: Solve for x
   x = 89,653,200.62/10,162.05
6. Step 6: Final answer
   x = 8,822.35