Finding the Fourth Proportional to 80,947.38, 121,411.95 and 21,787.82

Step by Step Solution

1. Step 1: Write the proportion equation
   80,947.38 : 121,411.95 = 21,787.82 : x
2. Step 2: Convert to fraction form
   80,947.38/121,411.95 = 21,787.82/x
3. Step 3: Cross multiply
   80,947.38x = 121,411.95 × 21,787.82
4. Step 4: Simplify right side
   80,947.38x = 2,645,301,105.39
5. Step 5: Solve for x
   x = 2,645,301,105.39/80,947.38
6. Step 6: Final answer
   x = 32,679.27