Finding the Fourth Proportional to 10,420.05, 14,379.11 and 5,703.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,420.05 : 14,379.11 = 5,703.42 : x
2. Step 2: Convert to fraction form
   10,420.05/14,379.11 = 5,703.42/x
3. Step 3: Cross multiply
   10,420.05x = 14,379.11 × 5,703.42
4. Step 4: Simplify right side
   10,420.05x = 82,010,103.56
5. Step 5: Solve for x
   x = 82,010,103.56/10,420.05
6. Step 6: Final answer
   x = 7,870.41