Finding the Fourth Proportional to 13,391.91, 18,480.84 and 7,423.56

Step by Step Solution

1. Step 1: Write the proportion equation
   13,391.91 : 18,480.84 = 7,423.56 : x
2. Step 2: Convert to fraction form
   13,391.91/18,480.84 = 7,423.56/x
3. Step 3: Cross multiply
   13,391.91x = 18,480.84 × 7,423.56
4. Step 4: Simplify right side
   13,391.91x = 137,193,624.59
5. Step 5: Solve for x
   x = 137,193,624.59/13,391.91
6. Step 6: Final answer
   x = 10,244.52