Finding the Fourth Proportional to 57,936.72, 86,470.71 and 54,153.31

Step by Step Solution

1. Step 1: Write the proportion equation
   57,936.72 : 86,470.71 = 54,153.31 : x
2. Step 2: Convert to fraction form
   57,936.72/86,470.71 = 54,153.31/x
3. Step 3: Cross multiply
   57,936.72x = 86,470.71 × 54,153.31
4. Step 4: Simplify right side
   57,936.72x = 4,682,675,364.35
5. Step 5: Solve for x
   x = 4,682,675,364.35/57,936.72
6. Step 6: Final answer
   x = 80,823.97