Finding the Fourth Proportional to 9,509.85, 13,123.31 and 5,318.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,509.85 : 13,123.31 = 5,318.01 : x
2. Step 2: Convert to fraction form
   9,509.85/13,123.31 = 5,318.01/x
3. Step 3: Cross multiply
   9,509.85x = 13,123.31 × 5,318.01
4. Step 4: Simplify right side
   9,509.85x = 69,789,867.22
5. Step 5: Solve for x
   x = 69,789,867.22/9,509.85
6. Step 6: Final answer
   x = 7,338.69