Finding the Fourth Proportional to 12,659.21, 17,463.49 and 8,186.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,659.21 : 17,463.49 = 8,186.79 : x
2. Step 2: Convert to fraction form
   12,659.21/17,463.49 = 8,186.79/x
3. Step 3: Cross multiply
   12,659.21x = 17,463.49 × 8,186.79
4. Step 4: Simplify right side
   12,659.21x = 142,969,925.30
5. Step 5: Solve for x
   x = 142,969,925.30/12,659.21
6. Step 6: Final answer
   x = 11,293.75