Finding the Fourth Proportional to 215,584.48, 323,131.50 and 131,158.54

Step by Step Solution

1. Step 1: Write the proportion equation
   215,584.48 : 323,131.50 = 131,158.54 : x
2. Step 2: Convert to fraction form
   215,584.48/323,131.50 = 131,158.54/x
3. Step 3: Cross multiply
   215,584.48x = 323,131.50 × 131,158.54
4. Step 4: Simplify right side
   215,584.48x = 42,381,456,540.81
5. Step 5: Solve for x
   x = 42,381,456,540.81/215,584.48
6. Step 6: Final answer
   x = 196,588.62