Finding the Fourth Proportional to 115,474.56, 159,351.83 and 64,485.88

Step by Step Solution

1. Step 1: Write the proportion equation
   115,474.56 : 159,351.83 = 64,485.88 : x
2. Step 2: Convert to fraction form
   115,474.56/159,351.83 = 64,485.88/x
3. Step 3: Cross multiply
   115,474.56x = 159,351.83 × 64,485.88
4. Step 4: Simplify right side
   115,474.56x = 10,275,942,987.16
5. Step 5: Solve for x
   x = 10,275,942,987.16/115,474.56
6. Step 6: Final answer
   x = 88,988.80