Finding the Fourth Proportional to 13,056.99, 18,017.42 and 7,391.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,056.99 : 18,017.42 = 7,391.04 : x
2. Step 2: Convert to fraction form
   13,056.99/18,017.42 = 7,391.04/x
3. Step 3: Cross multiply
   13,056.99x = 18,017.42 × 7,391.04
4. Step 4: Simplify right side
   13,056.99x = 133,167,434.96
5. Step 5: Solve for x
   x = 133,167,434.96/13,056.99
6. Step 6: Final answer
   x = 10,198.94