Finding the Fourth Proportional to 10,428.52, 14,379.82 and 6,645.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.52 : 14,379.82 = 6,645.69 : x
2. Step 2: Convert to fraction form
   10,428.52/14,379.82 = 6,645.69/x
3. Step 3: Cross multiply
   10,428.52x = 14,379.82 × 6,645.69
4. Step 4: Simplify right side
   10,428.52x = 95,563,720.85
5. Step 5: Solve for x
   x = 95,563,720.85/10,428.52
6. Step 6: Final answer
   x = 9,163.69