Finding the Third Proportional to 3,517.59 and 5,428.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,517.59 : 5,428.69 = 5,428.69 : x
2. Step 2: Convert to fraction form
   3,517.59/5,428.69 = 5,428.69/x
3. Step 3: Cross multiply
   3,517.59x = 5,428.69 × 5,428.69
4. Step 4: Simplify right side
   3,517.59x = 29,470,647.97
5. Step 5: Solve for x
   x = 29,470,647.97/3,517.59
6. Step 6: Final answer
   x = 8,378.07