Finding the Fourth Proportional to 12,086.39, 16,680.60 and 11,698.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.39 : 16,680.60 = 11,698.88 : x
2. Step 2: Convert to fraction form
   12,086.39/16,680.60 = 11,698.88/x
3. Step 3: Cross multiply
   12,086.39x = 16,680.60 × 11,698.88
4. Step 4: Simplify right side
   12,086.39x = 195,144,254.33
5. Step 5: Solve for x
   x = 195,144,254.33/12,086.39
6. Step 6: Final answer
   x = 16,145.79