Finding the Fourth Proportional to 65,165.72, 89,936.27 and 39,687.02

Step by Step Solution

1. Step 1: Write the proportion equation
   65,165.72 : 89,936.27 = 39,687.02 : x
2. Step 2: Convert to fraction form
   65,165.72/89,936.27 = 39,687.02/x
3. Step 3: Cross multiply
   65,165.72x = 89,936.27 × 39,687.02
4. Step 4: Simplify right side
   65,165.72x = 3,569,302,860.37
5. Step 5: Solve for x
   x = 3,569,302,860.37/65,165.72
6. Step 6: Final answer
   x = 54,772.70