Finding the Fourth Proportional to 120,956.72, 166,479.60 and 106,522.16

Step by Step Solution

1. Step 1: Write the proportion equation
   120,956.72 : 166,479.60 = 106,522.16 : x
2. Step 2: Convert to fraction form
   120,956.72/166,479.60 = 106,522.16/x
3. Step 3: Cross multiply
   120,956.72x = 166,479.60 × 106,522.16
4. Step 4: Simplify right side
   120,956.72x = 17,733,766,587.94
5. Step 5: Solve for x
   x = 17,733,766,587.94/120,956.72
6. Step 6: Final answer
   x = 146,612.50