Finding the Fourth Proportional to 12,730.40, 19,109.57 and 10,114.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,730.40 : 19,109.57 = 10,114.72 : x
2. Step 2: Convert to fraction form
   12,730.40/19,109.57 = 10,114.72/x
3. Step 3: Cross multiply
   12,730.40x = 19,109.57 × 10,114.72
4. Step 4: Simplify right side
   12,730.40x = 193,287,949.87
5. Step 5: Solve for x
   x = 193,287,949.87/12,730.40
6. Step 6: Final answer
   x = 15,183.18