Finding the Fourth Proportional to 12,716.56, 17,554.62 and 8,185.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,716.56 : 17,554.62 = 8,185.78 : x
2. Step 2: Convert to fraction form
   12,716.56/17,554.62 = 8,185.78/x
3. Step 3: Cross multiply
   12,716.56x = 17,554.62 × 8,185.78
4. Step 4: Simplify right side
   12,716.56x = 143,698,257.30
5. Step 5: Solve for x
   x = 143,698,257.30/12,716.56
6. Step 6: Final answer
   x = 11,300.09