Finding the Fourth Proportional to 80,947.32, 121,441.48 and 28,355.43

Step by Step Solution

1. Step 1: Write the proportion equation
   80,947.32 : 121,441.48 = 28,355.43 : x
2. Step 2: Convert to fraction form
   80,947.32/121,441.48 = 28,355.43/x
3. Step 3: Cross multiply
   80,947.32x = 121,441.48 × 28,355.43
4. Step 4: Simplify right side
   80,947.32x = 3,443,525,769.75
5. Step 5: Solve for x
   x = 3,443,525,769.75/80,947.32
6. Step 6: Final answer
   x = 42,540.33