Finding the Fourth Proportional to 115,778.79, 159,783.33 and 64,796.64

Step by Step Solution

1. Step 1: Write the proportion equation
   115,778.79 : 159,783.33 = 64,796.64 : x
2. Step 2: Convert to fraction form
   115,778.79/159,783.33 = 64,796.64/x
3. Step 3: Cross multiply
   115,778.79x = 159,783.33 × 64,796.64
4. Step 4: Simplify right side
   115,778.79x = 10,353,422,912.01
5. Step 5: Solve for x
   x = 10,353,422,912.01/115,778.79
6. Step 6: Final answer
   x = 89,424.18