Finding the Fourth Proportional to 10,420.30, 14,379.46 and 5,703.67

Step by Step Solution

1. Step 1: Write the proportion equation
   10,420.30 : 14,379.46 = 5,703.67 : x
2. Step 2: Convert to fraction form
   10,420.30/14,379.46 = 5,703.67/x
3. Step 3: Cross multiply
   10,420.30x = 14,379.46 × 5,703.67
4. Step 4: Simplify right side
   10,420.30x = 82,015,694.62
5. Step 5: Solve for x
   x = 82,015,694.62/10,420.30
6. Step 6: Final answer
   x = 7,870.76