Finding the Fourth Proportional to 8,945.96, 12,345.78 and 5,169

Step by Step Solution

1. Step 1: Write the proportion equation
   8,945.96 : 12,345.78 = 5,169 : x
2. Step 2: Convert to fraction form
   8,945.96/12,345.78 = 5,169/x
3. Step 3: Cross multiply
   8,945.96x = 12,345.78 × 5,169
4. Step 4: Simplify right side
   8,945.96x = 63,815,336.82
5. Step 5: Solve for x
   x = 63,815,336.82/8,945.96
6. Step 6: Final answer
   x = 7,133.43