Finding the Fourth Proportional to 12,697.69, 17,517.28 and 7,659.11

Step by Step Solution

1. Step 1: Write the proportion equation
   12,697.69 : 17,517.28 = 7,659.11 : x
2. Step 2: Convert to fraction form
   12,697.69/17,517.28 = 7,659.11/x
3. Step 3: Cross multiply
   12,697.69x = 17,517.28 × 7,659.11
4. Step 4: Simplify right side
   12,697.69x = 134,166,774.42
5. Step 5: Solve for x
   x = 134,166,774.42/12,697.69
6. Step 6: Final answer
   x = 10,566.23