Finding the Fourth Proportional to 13,057.34, 18,017.71 and 7,391.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,057.34 : 18,017.71 = 7,391.18 : x
2. Step 2: Convert to fraction form
   13,057.34/18,017.71 = 7,391.18/x
3. Step 3: Cross multiply
   13,057.34x = 18,017.71 × 7,391.18
4. Step 4: Simplify right side
   13,057.34x = 133,172,164.36
5. Step 5: Solve for x
   x = 133,172,164.36/13,057.34
6. Step 6: Final answer
   x = 10,199.03