Finding the Fourth Proportional to 12,698.27, 17,508.30 and 10,926.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,698.27 : 17,508.30 = 10,926.80 : x
2. Step 2: Convert to fraction form
   12,698.27/17,508.30 = 10,926.80/x
3. Step 3: Cross multiply
   12,698.27x = 17,508.30 × 10,926.80
4. Step 4: Simplify right side
   12,698.27x = 191,309,691.04
5. Step 5: Solve for x
   x = 191,309,691.04/12,698.27
6. Step 6: Final answer
   x = 15,065.81