Finding the Fourth Proportional to 13,389.66, 18,478.82 and 7,423.25

Step by Step Solution

1. Step 1: Write the proportion equation
   13,389.66 : 18,478.82 = 7,423.25 : x
2. Step 2: Convert to fraction form
   13,389.66/18,478.82 = 7,423.25/x
3. Step 3: Cross multiply
   13,389.66x = 18,478.82 × 7,423.25
4. Step 4: Simplify right side
   13,389.66x = 137,172,826.73
5. Step 5: Solve for x
   x = 137,172,826.73/13,389.66
6. Step 6: Final answer
   x = 10,244.68