Finding the Fourth Proportional to 45,568, 68,354.56 and 12,738.56

Step by Step Solution

1. Step 1: Write the proportion equation
   45,568 : 68,354.56 = 12,738.56 : x
2. Step 2: Convert to fraction form
   45,568/68,354.56 = 12,738.56/x
3. Step 3: Cross multiply
   45,568x = 68,354.56 × 12,738.56
4. Step 4: Simplify right side
   45,568x = 870,738,663.83
5. Step 5: Solve for x
   x = 870,738,663.83/45,568
6. Step 6: Final answer
   x = 19,108.56