Finding the Fourth Proportional to 215,662.48, 323,593.92 and 82,498.72

Step by Step Solution

1. Step 1: Write the proportion equation
   215,662.48 : 323,593.92 = 82,498.72 : x
2. Step 2: Convert to fraction form
   215,662.48/323,593.92 = 82,498.72/x
3. Step 3: Cross multiply
   215,662.48x = 323,593.92 × 82,498.72
4. Step 4: Simplify right side
   215,662.48x = 26,696,084,199.78
5. Step 5: Solve for x
   x = 26,696,084,199.78/215,662.48
6. Step 6: Final answer
   x = 123,786.41