Finding the Fourth Proportional to 13,057.99, 18,018.79 and 7,392.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.99 : 18,018.79 = 7,392.04 : x
2. Step 2: Convert to fraction form
   13,057.99/18,018.79 = 7,392.04/x
3. Step 3: Cross multiply
   13,057.99x = 18,018.79 × 7,392.04
4. Step 4: Simplify right side
   13,057.99x = 133,195,616.43
5. Step 5: Solve for x
   x = 133,195,616.43/13,057.99
6. Step 6: Final answer
   x = 10,200.32