Finding the Fourth Proportional to 12,738.63, 19,108.80 and 3,378.51

Step by Step Solution

1. Step 1: Write the proportion equation
   12,738.63 : 19,108.80 = 3,378.51 : x
2. Step 2: Convert to fraction form
   12,738.63/19,108.80 = 3,378.51/x
3. Step 3: Cross multiply
   12,738.63x = 19,108.80 × 3,378.51
4. Step 4: Simplify right side
   12,738.63x = 64,559,271.89
5. Step 5: Solve for x
   x = 64,559,271.89/12,738.63
6. Step 6: Final answer
   x = 5,067.99