Finding the Fourth Proportional to 13,359.36, 18,434.78 and 7,391.04

Step by Step Solution

1. Step 1: Write the proportion equation
   13,359.36 : 18,434.78 = 7,391.04 : x
2. Step 2: Convert to fraction form
   13,359.36/18,434.78 = 7,391.04/x
3. Step 3: Cross multiply
   13,359.36x = 18,434.78 × 7,391.04
4. Step 4: Simplify right side
   13,359.36x = 136,252,196.37
5. Step 5: Solve for x
   x = 136,252,196.37/13,359.36
6. Step 6: Final answer
   x = 10,199.01