Finding the Third Proportional to 3,399.19 and 4,870.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,399.19 : 4,870.69 = 4,870.69 : x
2. Step 2: Convert to fraction form
   3,399.19/4,870.69 = 4,870.69/x
3. Step 3: Cross multiply
   3,399.19x = 4,870.69 × 4,870.69
4. Step 4: Simplify right side
   3,399.19x = 23,723,596.72
5. Step 5: Solve for x
   x = 23,723,596.72/3,399.19
6. Step 6: Final answer
   x = 6,979.20