Finding the Fourth Proportional to 80,885.52, 121,345.56 and 28,296.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80,885.52 : 121,345.56 = 28,296.72 : x
2. Step 2: Convert to fraction form
   80,885.52/121,345.56 = 28,296.72/x
3. Step 3: Cross multiply
   80,885.52x = 121,345.56 × 28,296.72
4. Step 4: Simplify right side
   80,885.52x = 3,433,681,334.56
5. Step 5: Solve for x
   x = 3,433,681,334.56/80,885.52
6. Step 6: Final answer
   x = 42,451.13