Finding the Fourth Proportional to 80,899.82, 121,404.40 and 28,309.76

Step by Step Solution

1. Step 1: Write the proportion equation
   80,899.82 : 121,404.40 = 28,309.76 : x
2. Step 2: Convert to fraction form
   80,899.82/121,404.40 = 28,309.76/x
3. Step 3: Cross multiply
   80,899.82x = 121,404.40 × 28,309.76
4. Step 4: Simplify right side
   80,899.82x = 3,436,928,749.15
5. Step 5: Solve for x
   x = 3,436,928,749.15/80,899.82
6. Step 6: Final answer
   x = 42,483.77