Finding the Fourth Proportional to 12,877.72, 19,313.46 and 3,517.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,877.72 : 19,313.46 = 3,517.78 : x
2. Step 2: Convert to fraction form
   12,877.72/19,313.46 = 3,517.78/x
3. Step 3: Cross multiply
   12,877.72x = 19,313.46 × 3,517.78
4. Step 4: Simplify right side
   12,877.72x = 67,940,485.73
5. Step 5: Solve for x
   x = 67,940,485.73/12,877.72
6. Step 6: Final answer
   x = 5,275.82