Finding the Fourth Proportional to 10,419.72, 14,379.39 and 5,704.26

Step by Step Solution

1. Step 1: Write the proportion equation
   10,419.72 : 14,379.39 = 5,704.26 : x
2. Step 2: Convert to fraction form
   10,419.72/14,379.39 = 5,704.26/x
3. Step 3: Cross multiply
   10,419.72x = 14,379.39 × 5,704.26
4. Step 4: Simplify right side
   10,419.72x = 82,023,779.20
5. Step 5: Solve for x
   x = 82,023,779.20/10,419.72
6. Step 6: Final answer
   x = 7,871.98