Finding the Fourth Proportional to 7,661.28, 10,576.60 and 5,156.56

Step by Step Solution

1. Step 1: Write the proportion equation
   7,661.28 : 10,576.60 = 5,156.56 : x
2. Step 2: Convert to fraction form
   7,661.28/10,576.60 = 5,156.56/x
3. Step 3: Cross multiply
   7,661.28x = 10,576.60 × 5,156.56
4. Step 4: Simplify right side
   7,661.28x = 54,538,872.50
5. Step 5: Solve for x
   x = 54,538,872.50/7,661.28
6. Step 6: Final answer
   x = 7,118.77