Finding the Third Proportional to 3,580.88 and 7,690.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,580.88 : 7,690.69 = 7,690.69 : x
2. Step 2: Convert to fraction form
   3,580.88/7,690.69 = 7,690.69/x
3. Step 3: Cross multiply
   3,580.88x = 7,690.69 × 7,690.69
4. Step 4: Simplify right side
   3,580.88x = 59,146,674.22
5. Step 5: Solve for x
   x = 59,146,674.22/3,580.88
6. Step 6: Final answer
   x = 16,517.38