Finding the Fourth Proportional to 21,417.91, 32,109.55 and 8,947.49

Step by Step Solution

1. Step 1: Write the proportion equation
   21,417.91 : 32,109.55 = 8,947.49 : x
2. Step 2: Convert to fraction form
   21,417.91/32,109.55 = 8,947.49/x
3. Step 3: Cross multiply
   21,417.91x = 32,109.55 × 8,947.49
4. Step 4: Simplify right side
   21,417.91x = 287,299,694.61
5. Step 5: Solve for x
   x = 287,299,694.61/21,417.91
6. Step 6: Final answer
   x = 13,413.99