Finding the Fourth Proportional to 8,945.54, 12,342.98 and 5,168.64

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.54 : 12,342.98 = 5,168.64 : x
2. Step 2: Convert to fraction form
   8,945.54/12,342.98 = 5,168.64/x
3. Step 3: Cross multiply
   8,945.54x = 12,342.98 × 5,168.64
4. Step 4: Simplify right side
   8,945.54x = 63,796,420.15
5. Step 5: Solve for x
   x = 63,796,420.15/8,945.54
6. Step 6: Final answer
   x = 7,131.65