Finding the Fourth Proportional to 13,614.17, 18,786.89 and 7,646.09

Step by Step Solution

1. Step 1: Write the proportion equation
   13,614.17 : 18,786.89 = 7,646.09 : x
2. Step 2: Convert to fraction form
   13,614.17/18,786.89 = 7,646.09/x
3. Step 3: Cross multiply
   13,614.17x = 18,786.89 × 7,646.09
4. Step 4: Simplify right side
   13,614.17x = 143,646,213.53
5. Step 5: Solve for x
   x = 143,646,213.53/13,614.17
6. Step 6: Final answer
   x = 10,551.23