Finding the Fourth Proportional to 13,368.62, 18,447.89 and 7,399.94

Step by Step Solution

1. Step 1: Write the proportion equation
   13,368.62 : 18,447.89 = 7,399.94 : x
2. Step 2: Convert to fraction form
   13,368.62/18,447.89 = 7,399.94/x
3. Step 3: Cross multiply
   13,368.62x = 18,447.89 × 7,399.94
4. Step 4: Simplify right side
   13,368.62x = 136,513,149.89
5. Step 5: Solve for x
   x = 136,513,149.89/13,368.62
6. Step 6: Final answer
   x = 10,211.47