Finding the Fourth Proportional to 13,629.25, 18,807.43 and 7,661.82

Step by Step Solution

1. Step 1: Write the proportion equation
   13,629.25 : 18,807.43 = 7,661.82 : x
2. Step 2: Convert to fraction form
   13,629.25/18,807.43 = 7,661.82/x
3. Step 3: Cross multiply
   13,629.25x = 18,807.43 × 7,661.82
4. Step 4: Simplify right side
   13,629.25x = 144,099,143.32
5. Step 5: Solve for x
   x = 144,099,143.32/13,629.25
6. Step 6: Final answer
   x = 10,572.79