Finding the Fourth Proportional to 115,956.37, 159,949.06 and 76,665.21

Step by Step Solution

1. Step 1: Write the proportion equation
   115,956.37 : 159,949.06 = 76,665.21 : x
2. Step 2: Convert to fraction form
   115,956.37/159,949.06 = 76,665.21/x
3. Step 3: Cross multiply
   115,956.37x = 159,949.06 × 76,665.21
4. Step 4: Simplify right side
   115,956.37x = 12,262,527,890.88
5. Step 5: Solve for x
   x = 12,262,527,890.88/115,956.37
6. Step 6: Final answer
   x = 105,751.23