Finding the Fourth Proportional to 120,406.15, 166,161.69 and 72,650.29

Step by Step Solution

1. Step 1: Write the proportion equation
   120,406.15 : 166,161.69 = 72,650.29 : x
2. Step 2: Convert to fraction form
   120,406.15/166,161.69 = 72,650.29/x
3. Step 3: Cross multiply
   120,406.15x = 166,161.69 × 72,650.29
4. Step 4: Simplify right side
   120,406.15x = 12,071,694,965.39
5. Step 5: Solve for x
   x = 12,071,694,965.39/120,406.15
6. Step 6: Final answer
   x = 100,258.13