Finding the Fourth Proportional to 12,621.33, 17,410.82 and 9,631.97

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.33 : 17,410.82 = 9,631.97 : x
2. Step 2: Convert to fraction form
   12,621.33/17,410.82 = 9,631.97/x
3. Step 3: Cross multiply
   12,621.33x = 17,410.82 × 9,631.97
4. Step 4: Simplify right side
   12,621.33x = 167,700,360.70
5. Step 5: Solve for x
   x = 167,700,360.70/12,621.33
6. Step 6: Final answer
   x = 13,287.06