Finding the Fourth Proportional to 10,321.20, 14,243.40 and 5,605.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,321.20 : 14,243.40 = 5,605.56 : x
2. Step 2: Convert to fraction form
   10,321.20/14,243.40 = 5,605.56/x
3. Step 3: Cross multiply
   10,321.20x = 14,243.40 × 5,605.56
4. Step 4: Simplify right side
   10,321.20x = 79,842,233.30
5. Step 5: Solve for x
   x = 79,842,233.30/10,321.20
6. Step 6: Final answer
   x = 7,735.75