Finding the Fourth Proportional to 13,113.38, 18,096.90 and 7,144.76

Step by Step Solution

1. Step 1: Write the proportion equation
   13,113.38 : 18,096.90 = 7,144.76 : x
2. Step 2: Convert to fraction form
   13,113.38/18,096.90 = 7,144.76/x
3. Step 3: Cross multiply
   13,113.38x = 18,096.90 × 7,144.76
4. Step 4: Simplify right side
   13,113.38x = 129,298,007.24
5. Step 5: Solve for x
   x = 129,298,007.24/13,113.38
6. Step 6: Final answer
   x = 9,860.01