Finding the Fourth Proportional to 12,734.78, 19,107.21 and 4,945.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,734.78 : 19,107.21 = 4,945.82 : x
2. Step 2: Convert to fraction form
   12,734.78/19,107.21 = 4,945.82/x
3. Step 3: Cross multiply
   12,734.78x = 19,107.21 × 4,945.82
4. Step 4: Simplify right side
   12,734.78x = 94,500,821.36
5. Step 5: Solve for x
   x = 94,500,821.36/12,734.78
6. Step 6: Final answer
   x = 7,420.69