Finding the Fourth Proportional to 80,738.82, 121,098.83 and 21,579.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,738.82 : 121,098.83 = 21,579.12 : x
2. Step 2: Convert to fraction form
   80,738.82/121,098.83 = 21,579.12/x
3. Step 3: Cross multiply
   80,738.82x = 121,098.83 × 21,579.12
4. Step 4: Simplify right side
   80,738.82x = 2,613,206,076.53
5. Step 5: Solve for x
   x = 2,613,206,076.53/80,738.82
6. Step 6: Final answer
   x = 32,366.17