Finding the Fourth Proportional to 13,142.43, 18,136.96 and 7,174.49

Step by Step Solution

1. Step 1: Write the proportion equation
   13,142.43 : 18,136.96 = 7,174.49 : x
2. Step 2: Convert to fraction form
   13,142.43/18,136.96 = 7,174.49/x
3. Step 3: Cross multiply
   13,142.43x = 18,136.96 × 7,174.49
4. Step 4: Simplify right side
   13,142.43x = 130,123,329.53
5. Step 5: Solve for x
   x = 130,123,329.53/13,142.43
6. Step 6: Final answer
   x = 9,901.01