Finding the Fourth Proportional to 12,910.56, 19,365.18 and 4,144.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,910.56 : 19,365.18 = 4,144.78 : x
2. Step 2: Convert to fraction form
   12,910.56/19,365.18 = 4,144.78/x
3. Step 3: Cross multiply
   12,910.56x = 19,365.18 × 4,144.78
4. Step 4: Simplify right side
   12,910.56x = 80,264,410.76
5. Step 5: Solve for x
   x = 80,264,410.76/12,910.56
6. Step 6: Final answer
   x = 6,216.96