Finding the Fourth Proportional to 215,588.50, 323,137.52 and 131,162.57

Step by Step Solution

1. Step 1: Write the proportion equation
   215,588.50 : 323,137.52 = 131,162.57 : x
2. Step 2: Convert to fraction form
   215,588.50/323,137.52 = 131,162.57/x
3. Step 3: Cross multiply
   215,588.50x = 323,137.52 × 131,162.57
4. Step 4: Simplify right side
   215,588.50x = 42,383,546,930.81
5. Step 5: Solve for x
   x = 42,383,546,930.81/215,588.50
6. Step 6: Final answer
   x = 196,594.66