Finding the Fourth Proportional to 113,818.72, 170,314.92 and 82,291.90

Step by Step Solution

1. Step 1: Write the proportion equation
   113,818.72 : 170,314.92 = 82,291.90 : x
2. Step 2: Convert to fraction form
   113,818.72/170,314.92 = 82,291.90/x
3. Step 3: Cross multiply
   113,818.72x = 170,314.92 × 82,291.90
4. Step 4: Simplify right side
   113,818.72x = 14,015,538,365.15
5. Step 5: Solve for x
   x = 14,015,538,365.15/113,818.72
6. Step 6: Final answer
   x = 123,139.13