Finding the Fourth Proportional to 9,438.48, 13,025.43 and 5,189.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,438.48 : 13,025.43 = 5,189.72 : x
2. Step 2: Convert to fraction form
   9,438.48/13,025.43 = 5,189.72/x
3. Step 3: Cross multiply
   9,438.48x = 13,025.43 × 5,189.72
4. Step 4: Simplify right side
   9,438.48x = 67,598,269.45
5. Step 5: Solve for x
   x = 67,598,269.45/9,438.48
6. Step 6: Final answer
   x = 7,161.99