Finding the Fourth Proportional to 9,926.72, 13,788.68 and 9,767.96

Step by Step Solution

1. Step 1: Write the proportion equation
   9,926.72 : 13,788.68 = 9,767.96 : x
2. Step 2: Convert to fraction form
   9,926.72/13,788.68 = 9,767.96/x
3. Step 3: Cross multiply
   9,926.72x = 13,788.68 × 9,767.96
4. Step 4: Simplify right side
   9,926.72x = 134,687,274.69
5. Step 5: Solve for x
   x = 134,687,274.69/9,926.72
6. Step 6: Final answer
   x = 13,568.15