Finding the Fourth Proportional to 113,994.27, 171,026.01 and 80,778.60

Step by Step Solution

1. Step 1: Write the proportion equation
   113,994.27 : 171,026.01 = 80,778.60 : x
2. Step 2: Convert to fraction form
   113,994.27/171,026.01 = 80,778.60/x
3. Step 3: Cross multiply
   113,994.27x = 171,026.01 × 80,778.60
4. Step 4: Simplify right side
   113,994.27x = 13,815,241,651.39
5. Step 5: Solve for x
   x = 13,815,241,651.39/113,994.27
6. Step 6: Final answer
   x = 121,192.42