Finding the Fourth Proportional to 115,659.72, 159,608.34 and 65,357.64

Step by Step Solution

1. Step 1: Write the proportion equation
   115,659.72 : 159,608.34 = 65,357.64 : x
2. Step 2: Convert to fraction form
   115,659.72/159,608.34 = 65,357.64/x
3. Step 3: Cross multiply
   115,659.72x = 159,608.34 × 65,357.64
4. Step 4: Simplify right side
   115,659.72x = 10,431,624,426.72
5. Step 5: Solve for x
   x = 10,431,624,426.72/115,659.72
6. Step 6: Final answer
   x = 90,192.37