Finding the Fourth Proportional to 115,906.96, 159,955.55 and 64,921.87

Step by Step Solution

1. Step 1: Write the proportion equation
   115,906.96 : 159,955.55 = 64,921.87 : x
2. Step 2: Convert to fraction form
   115,906.96/159,955.55 = 64,921.87/x
3. Step 3: Cross multiply
   115,906.96x = 159,955.55 × 64,921.87
4. Step 4: Simplify right side
   115,906.96x = 10,384,613,422.88
5. Step 5: Solve for x
   x = 10,384,613,422.88/115,906.96
6. Step 6: Final answer
   x = 89,594.39