Finding the Fourth Proportional to 12,738.89, 19,107.44 and 3,378.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738.89 : 19,107.44 = 3,378.71 : x
2. Step 2: Convert to fraction form
   12,738.89/19,107.44 = 3,378.71/x
3. Step 3: Cross multiply
   12,738.89x = 19,107.44 × 3,378.71
4. Step 4: Simplify right side
   12,738.89x = 64,558,498.60
5. Step 5: Solve for x
   x = 64,558,498.60/12,738.89
6. Step 6: Final answer
   x = 5,067.83