Finding the Fourth Proportional to 8,945.54, 12,345.42 and 5,168.87

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.54 : 12,345.42 = 5,168.87 : x
2. Step 2: Convert to fraction form
   8,945.54/12,345.42 = 5,168.87/x
3. Step 3: Cross multiply
   8,945.54x = 12,345.42 × 5,168.87
4. Step 4: Simplify right side
   8,945.54x = 63,811,809.35
5. Step 5: Solve for x
   x = 63,811,809.35/8,945.54
6. Step 6: Final answer
   x = 7,133.37