Finding the Fourth Proportional to 65,108.50, 89,856.42 and 39,616.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,108.50 : 89,856.42 = 39,616.72 : x
2. Step 2: Convert to fraction form
   65,108.50/89,856.42 = 39,616.72/x
3. Step 3: Cross multiply
   65,108.50x = 89,856.42 × 39,616.72
4. Step 4: Simplify right side
   65,108.50x = 3,559,816,631.34
5. Step 5: Solve for x
   x = 3,559,816,631.34/65,108.50
6. Step 6: Final answer
   x = 54,675.14