Finding the Fourth Proportional to 12,371.61, 18,532.69 and 7,438.54

Step by Step Solution

1. Step 1: Write the proportion equation
   12,371.61 : 18,532.69 = 7,438.54 : x
2. Step 2: Convert to fraction form
   12,371.61/18,532.69 = 7,438.54/x
3. Step 3: Cross multiply
   12,371.61x = 18,532.69 × 7,438.54
4. Step 4: Simplify right side
   12,371.61x = 137,856,155.87
5. Step 5: Solve for x
   x = 137,856,155.87/12,371.61
6. Step 6: Final answer
   x = 11,142.94