Finding the Fourth Proportional to 80,676.96, 121,035.06 and 28,086.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,676.96 : 121,035.06 = 28,086.72 : x
2. Step 2: Convert to fraction form
   80,676.96/121,035.06 = 28,086.72/x
3. Step 3: Cross multiply
   80,676.96x = 121,035.06 × 28,086.72
4. Step 4: Simplify right side
   80,676.96x = 3,399,477,840.40
5. Step 5: Solve for x
   x = 3,399,477,840.40/80,676.96
6. Step 6: Final answer
   x = 42,136.91