Finding the Fourth Proportional to 13,392.59, 18,479.83 and 7,424.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,392.59 : 18,479.83 = 7,424.25 : x
2. Step 2: Convert to fraction form
   13,392.59/18,479.83 = 7,424.25/x
3. Step 3: Cross multiply
   13,392.59x = 18,479.83 × 7,424.25
4. Step 4: Simplify right side
   13,392.59x = 137,198,840.76
5. Step 5: Solve for x
   x = 137,198,840.76/13,392.59
6. Step 6: Final answer
   x = 10,244.39