Finding the Fourth Proportional to 120,336.83, 166,058.50 and 65,878.57

Step by Step Solution

1. Step 1: Write the proportion equation
   120,336.83 : 166,058.50 = 65,878.57 : x
2. Step 2: Convert to fraction form
   120,336.83/166,058.50 = 65,878.57/x
3. Step 3: Cross multiply
   120,336.83x = 166,058.50 × 65,878.57
4. Step 4: Simplify right side
   120,336.83x = 10,939,696,516.35
5. Step 5: Solve for x
   x = 10,939,696,516.35/120,336.83
6. Step 6: Final answer
   x = 90,908.96