Finding the Fourth Proportional to 80,727.72, 121,025.98 and 28,174.12

Step by Step Solution

1. Step 1: Write the proportion equation
   80,727.72 : 121,025.98 = 28,174.12 : x
2. Step 2: Convert to fraction form
   80,727.72/121,025.98 = 28,174.12/x
3. Step 3: Cross multiply
   80,727.72x = 121,025.98 × 28,174.12
4. Step 4: Simplify right side
   80,727.72x = 3,409,800,483.64
5. Step 5: Solve for x
   x = 3,409,800,483.64/80,727.72
6. Step 6: Final answer
   x = 42,238.29