Finding the Fourth Proportional to 13,401.92, 18,494.62 and 7,434.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,401.92 : 18,494.62 = 7,434.50 : x
2. Step 2: Convert to fraction form
   13,401.92/18,494.62 = 7,434.50/x
3. Step 3: Cross multiply
   13,401.92x = 18,494.62 × 7,434.50
4. Step 4: Simplify right side
   13,401.92x = 137,498,252.39
5. Step 5: Solve for x
   x = 137,498,252.39/13,401.92
6. Step 6: Final answer
   x = 10,259.59