Finding the Fourth Proportional to 216,131.60, 298,261.92 and 120,638.24

Step by Step Solution

1. Step 1: Write the proportion equation
   216,131.60 : 298,261.92 = 120,638.24 : x
2. Step 2: Convert to fraction form
   216,131.60/298,261.92 = 120,638.24/x
3. Step 3: Cross multiply
   216,131.60x = 298,261.92 × 120,638.24
4. Step 4: Simplify right side
   216,131.60x = 35,981,793,087.82
5. Step 5: Solve for x
   x = 35,981,793,087.82/216,131.60
6. Step 6: Final answer
   x = 166,480.95