Finding the Fourth Proportional to 140,831, 194,346.78 and 77,171.22

Step by Step Solution

1. Step 1: Write the proportion equation
   140,831 : 194,346.78 = 77,171.22 : x
2. Step 2: Convert to fraction form
   140,831/194,346.78 = 77,171.22/x
3. Step 3: Cross multiply
   140,831x = 194,346.78 × 77,171.22
4. Step 4: Simplify right side
   140,831x = 14,997,978,115.67
5. Step 5: Solve for x
   x = 14,997,978,115.67/140,831
6. Step 6: Final answer
   x = 106,496.28