Finding the Fourth Proportional to 13,662.51, 18,854.04 and 7,694.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,662.51 : 18,854.04 = 7,694.16 : x
2. Step 2: Convert to fraction form
   13,662.51/18,854.04 = 7,694.16/x
3. Step 3: Cross multiply
   13,662.51x = 18,854.04 × 7,694.16
4. Step 4: Simplify right side
   13,662.51x = 145,066,021.33
5. Step 5: Solve for x
   x = 145,066,021.33/13,662.51
6. Step 6: Final answer
   x = 10,617.81