Finding the Fourth Proportional to 120,906.42, 181,390.32 and 71,028.69

Step by Step Solution

1. Step 1: Write the proportion equation
   120,906.42 : 181,390.32 = 71,028.69 : x
2. Step 2: Convert to fraction form
   120,906.42/181,390.32 = 71,028.69/x
3. Step 3: Cross multiply
   120,906.42x = 181,390.32 × 71,028.69
4. Step 4: Simplify right side
   120,906.42x = 12,883,916,808.28
5. Step 5: Solve for x
   x = 12,883,916,808.28/120,906.42
6. Step 6: Final answer
   x = 106,561.06