Finding the Fourth Proportional to 80,787.72, 121,188.06 and 28,196.04

Step by Step Solution

1. Step 1: Write the proportion equation
   80,787.72 : 121,188.06 = 28,196.04 : x
2. Step 2: Convert to fraction form
   80,787.72/121,188.06 = 28,196.04/x
3. Step 3: Cross multiply
   80,787.72x = 121,188.06 × 28,196.04
4. Step 4: Simplify right side
   80,787.72x = 3,417,023,387.28
5. Step 5: Solve for x
   x = 3,417,023,387.28/80,787.72
6. Step 6: Final answer
   x = 42,296.32