Finding the Fourth Proportional to 12,742.56, 17,576.16 and 7,774.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,742.56 : 17,576.16 = 7,774.56 : x
2. Step 2: Convert to fraction form
   12,742.56/17,576.16 = 7,774.56/x
3. Step 3: Cross multiply
   12,742.56x = 17,576.16 × 7,774.56
4. Step 4: Simplify right side
   12,742.56x = 136,646,910.49
5. Step 5: Solve for x
   x = 136,646,910.49/12,742.56
6. Step 6: Final answer
   x = 10,723.66