Finding the Fourth Proportional to 140,891, 194,449.47 and 87,193.31

Step by Step Solution

1. Step 1: Write the proportion equation
   140,891 : 194,449.47 = 87,193.31 : x
2. Step 2: Convert to fraction form
   140,891/194,449.47 = 87,193.31/x
3. Step 3: Cross multiply
   140,891x = 194,449.47 × 87,193.31
4. Step 4: Simplify right side
   140,891x = 16,954,692,917.05
5. Step 5: Solve for x
   x = 16,954,692,917.05/140,891
6. Step 6: Final answer
   x = 120,339.08