Finding the Fourth Proportional to 10,764.72, 16,171.38 and 6,385.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,764.72 : 16,171.38 = 6,385.05 : x
2. Step 2: Convert to fraction form
   10,764.72/16,171.38 = 6,385.05/x
3. Step 3: Cross multiply
   10,764.72x = 16,171.38 × 6,385.05
4. Step 4: Simplify right side
   10,764.72x = 103,255,069.87
5. Step 5: Solve for x
   x = 103,255,069.87/10,764.72
6. Step 6: Final answer
   x = 9,591.99