Finding the Fourth Proportional to 13,399.92, 18,492.04 and 7,431.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,399.92 : 18,492.04 = 7,431.68 : x
2. Step 2: Convert to fraction form
   13,399.92/18,492.04 = 7,431.68/x
3. Step 3: Cross multiply
   13,399.92x = 18,492.04 × 7,431.68
4. Step 4: Simplify right side
   13,399.92x = 137,426,923.83
5. Step 5: Solve for x
   x = 137,426,923.83/13,399.92
6. Step 6: Final answer
   x = 10,255.80