Finding the Third Proportional to 3,511.13 and 7,681.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,511.13 : 7,681.69 = 7,681.69 : x
2. Step 2: Convert to fraction form
   3,511.13/7,681.69 = 7,681.69/x
3. Step 3: Cross multiply
   3,511.13x = 7,681.69 × 7,681.69
4. Step 4: Simplify right side
   3,511.13x = 59,008,322.85
5. Step 5: Solve for x
   x = 59,008,322.85/3,511.13
6. Step 6: Final answer
   x = 16,806.10