Finding the Fourth Proportional to 13,401.72, 18,494.28 and 7,433.64

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.72 : 18,494.28 = 7,433.64 : x
2. Step 2: Convert to fraction form
   13,401.72/18,494.28 = 7,433.64/x
3. Step 3: Cross multiply
   13,401.72x = 18,494.28 × 7,433.64
4. Step 4: Simplify right side
   13,401.72x = 137,479,819.58
5. Step 5: Solve for x
   x = 137,479,819.58/13,401.72
6. Step 6: Final answer
   x = 10,258.37