Finding the Fourth Proportional to 7,676.56, 11,499.72 and 7,136.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,676.56 : 11,499.72 = 7,136.56 : x
2. Step 2: Convert to fraction form
   7,676.56/11,499.72 = 7,136.56/x
3. Step 3: Cross multiply
   7,676.56x = 11,499.72 × 7,136.56
4. Step 4: Simplify right side
   7,676.56x = 82,068,441.76
5. Step 5: Solve for x
   x = 82,068,441.76/7,676.56
6. Step 6: Final answer
   x = 10,690.78