Finding the Fourth Proportional to 115,943.59, 159,965.82 and 64,949.43

Step by Step Solution

1. Step 1: Write the proportion equation
   115,943.59 : 159,965.82 = 64,949.43 : x
2. Step 2: Convert to fraction form
   115,943.59/159,965.82 = 64,949.43/x
3. Step 3: Cross multiply
   115,943.59x = 159,965.82 × 64,949.43
4. Step 4: Simplify right side
   115,943.59x = 10,389,688,828.48
5. Step 5: Solve for x
   x = 10,389,688,828.48/115,943.59
6. Step 6: Final answer
   x = 89,609.86