Finding the Fourth Proportional to 13,730.92, 18,948.72 and 7,443.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,730.92 : 18,948.72 = 7,443.28 : x
2. Step 2: Convert to fraction form
   13,730.92/18,948.72 = 7,443.28/x
3. Step 3: Cross multiply
   13,730.92x = 18,948.72 × 7,443.28
4. Step 4: Simplify right side
   13,730.92x = 141,040,628.60
5. Step 5: Solve for x
   x = 141,040,628.60/13,730.92
6. Step 6: Final answer
   x = 10,271.75