Finding the Fourth Proportional to 16,947.72, 23,387.82 and 9,291

Step by Step Solution

1. Step 1: Write the proportion equation
   16,947.72 : 23,387.82 = 9,291 : x
2. Step 2: Convert to fraction form
   16,947.72/23,387.82 = 9,291/x
3. Step 3: Cross multiply
   16,947.72x = 23,387.82 × 9,291
4. Step 4: Simplify right side
   16,947.72x = 217,296,235.62
5. Step 5: Solve for x
   x = 217,296,235.62/16,947.72
6. Step 6: Final answer
   x = 12,821.56