Finding the Fourth Proportional to 13,401.47, 18,494.11 and 7,433.15

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.47 : 18,494.11 = 7,433.15 : x
2. Step 2: Convert to fraction form
   13,401.47/18,494.11 = 7,433.15/x
3. Step 3: Cross multiply
   13,401.47x = 18,494.11 × 7,433.15
4. Step 4: Simplify right side
   13,401.47x = 137,469,563.21
5. Step 5: Solve for x
   x = 137,469,563.21/13,401.47
6. Step 6: Final answer
   x = 10,257.80