Finding the Fourth Proportional to 65,110.50, 89,859.18 and 39,618.72

Step by Step Solution

1. Step 1: Write the proportion equation
   65,110.50 : 89,859.18 = 39,618.72 : x
2. Step 2: Convert to fraction form
   65,110.50/89,859.18 = 39,618.72/x
3. Step 3: Cross multiply
   65,110.50x = 89,859.18 × 39,618.72
4. Step 4: Simplify right side
   65,110.50x = 3,560,105,691.85
5. Step 5: Solve for x
   x = 3,560,105,691.85/65,110.50
6. Step 6: Final answer
   x = 54,677.90