Finding the Fourth Proportional to 12,641.50, 17,404.26 and 9,947.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,641.50 : 17,404.26 = 9,947.97 : x
2. Step 2: Convert to fraction form
   12,641.50/17,404.26 = 9,947.97/x
3. Step 3: Cross multiply
   12,641.50x = 17,404.26 × 9,947.97
4. Step 4: Simplify right side
   12,641.50x = 173,136,969.33
5. Step 5: Solve for x
   x = 173,136,969.33/12,641.50
6. Step 6: Final answer
   x = 13,695.93