Finding the Fourth Proportional to 120,351.25, 166,087.33 and 65,905.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,351.25 : 166,087.33 = 65,905.72 : x
2. Step 2: Convert to fraction form
   120,351.25/166,087.33 = 65,905.72/x
3. Step 3: Cross multiply
   120,351.25x = 166,087.33 × 65,905.72
4. Step 4: Simplify right side
   120,351.25x = 10,946,104,486.55
5. Step 5: Solve for x
   x = 10,946,104,486.55/120,351.25
6. Step 6: Final answer
   x = 90,951.31