Finding the Fourth Proportional to 14,640.78, 21,945.33 and 5,871.18

Step by Step Solution

1. Step 1: Write the proportion equation
   14,640.78 : 21,945.33 = 5,871.18 : x
2. Step 2: Convert to fraction form
   14,640.78/21,945.33 = 5,871.18/x
3. Step 3: Cross multiply
   14,640.78x = 21,945.33 × 5,871.18
4. Step 4: Simplify right side
   14,640.78x = 128,844,982.59
5. Step 5: Solve for x
   x = 128,844,982.59/14,640.78
6. Step 6: Final answer
   x = 8,800.42