Finding the Fourth Proportional to 12,944.54, 19,416.78 and 5,151.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,944.54 : 19,416.78 = 5,151.50 : x
2. Step 2: Convert to fraction form
   12,944.54/19,416.78 = 5,151.50/x
3. Step 3: Cross multiply
   12,944.54x = 19,416.78 × 5,151.50
4. Step 4: Simplify right side
   12,944.54x = 100,025,542.17
5. Step 5: Solve for x
   x = 100,025,542.17/12,944.54
6. Step 6: Final answer
   x = 7,727.24