Finding the Fourth Proportional to 120,931.38, 166,884.33 and 65,740.35

Step by Step Solution

1. Step 1: Write the proportion equation
   120,931.38 : 166,884.33 = 65,740.35 : x
2. Step 2: Convert to fraction form
   120,931.38/166,884.33 = 65,740.35/x
3. Step 3: Cross multiply
   120,931.38x = 166,884.33 × 65,740.35
4. Step 4: Simplify right side
   120,931.38x = 10,971,034,112.01
5. Step 5: Solve for x
   x = 10,971,034,112.01/120,931.38
6. Step 6: Final answer
   x = 90,721.15