Finding the Fourth Proportional to 10,419.99, 14,379.69 and 5,704.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,419.99 : 14,379.69 = 5,704.38 : x
2. Step 2: Convert to fraction form
   10,419.99/14,379.69 = 5,704.38/x
3. Step 3: Cross multiply
   10,419.99x = 14,379.69 × 5,704.38
4. Step 4: Simplify right side
   10,419.99x = 82,027,216.04
5. Step 5: Solve for x
   x = 82,027,216.04/10,419.99
6. Step 6: Final answer
   x = 7,872.10