Finding the Fourth Proportional to 7,698.72, 11,536.56 and 7,122.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,698.72 : 11,536.56 = 7,122.72 : x
2. Step 2: Convert to fraction form
   7,698.72/11,536.56 = 7,122.72/x
3. Step 3: Cross multiply
   7,698.72x = 11,536.56 × 7,122.72
4. Step 4: Simplify right side
   7,698.72x = 82,171,686.64
5. Step 5: Solve for x
   x = 82,171,686.64/7,698.72
6. Step 6: Final answer
   x = 10,673.42