Finding the Fourth Proportional to 120,353.25, 166,090.07 and 65,907.72

Step by Step Solution

1. Step 1: Write the proportion equation
   120,353.25 : 166,090.07 = 65,907.72 : x
2. Step 2: Convert to fraction form
   120,353.25/166,090.07 = 65,907.72/x
3. Step 3: Cross multiply
   120,353.25x = 166,090.07 × 65,907.72
4. Step 4: Simplify right side
   120,353.25x = 10,946,617,828.34
5. Step 5: Solve for x
   x = 10,946,617,828.34/120,353.25
6. Step 6: Final answer
   x = 90,954.07