Finding the Fourth Proportional to 65,141.46, 89,918.37 and 39,636.18

Step by Step Solution

1. Step 1: Write the proportion equation
   65,141.46 : 89,918.37 = 39,636.18 : x
2. Step 2: Convert to fraction form
   65,141.46/89,918.37 = 39,636.18/x
3. Step 3: Cross multiply
   65,141.46x = 89,918.37 × 39,636.18
4. Step 4: Simplify right side
   65,141.46x = 3,564,020,698.63
5. Step 5: Solve for x
   x = 3,564,020,698.63/65,141.46
6. Step 6: Final answer
   x = 54,712.02