Finding the Fourth Proportional to 10,385.42, 14,327.78 and 6,399.59

Step by Step Solution

1. Step 1: Write the proportion equation
   10,385.42 : 14,327.78 = 6,399.59 : x
2. Step 2: Convert to fraction form
   10,385.42/14,327.78 = 6,399.59/x
3. Step 3: Cross multiply
   10,385.42x = 14,327.78 × 6,399.59
4. Step 4: Simplify right side
   10,385.42x = 91,691,813.97
5. Step 5: Solve for x
   x = 91,691,813.97/10,385.42
6. Step 6: Final answer
   x = 8,828.90