Finding the Fourth Proportional to 12,621.83, 17,411.51 and 9,632.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,621.83 : 17,411.51 = 9,632.47 : x
2. Step 2: Convert to fraction form
   12,621.83/17,411.51 = 9,632.47/x
3. Step 3: Cross multiply
   12,621.83x = 17,411.51 × 9,632.47
4. Step 4: Simplify right side
   12,621.83x = 167,715,847.73
5. Step 5: Solve for x
   x = 167,715,847.73/12,621.83
6. Step 6: Final answer
   x = 13,287.76