Finding the Fourth Proportional to 140,131.89, 193,408.29 and 87,768.05

Step by Step Solution

1. Step 1: Write the proportion equation
   140,131.89 : 193,408.29 = 87,768.05 : x
2. Step 2: Convert to fraction form
   140,131.89/193,408.29 = 87,768.05/x
3. Step 3: Cross multiply
   140,131.89x = 193,408.29 × 87,768.05
4. Step 4: Simplify right side
   140,131.89x = 16,975,067,500.09
5. Step 5: Solve for x
   x = 16,975,067,500.09/140,131.89
6. Step 6: Final answer
   x = 121,136.36