Finding the Fourth Proportional to 10,420.22, 14,379.90 and 5,704.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,420.22 : 14,379.90 = 5,704.50 : x
2. Step 2: Convert to fraction form
   10,420.22/14,379.90 = 5,704.50/x
3. Step 3: Cross multiply
   10,420.22x = 14,379.90 × 5,704.50
4. Step 4: Simplify right side
   10,420.22x = 82,030,139.55
5. Step 5: Solve for x
   x = 82,030,139.55/10,420.22
6. Step 6: Final answer
   x = 7,872.21