Finding the Third Proportional to 3,806.72 and 5,690.81

Step by Step Solution

1. Step 1: Write the proportion equation
   3,806.72 : 5,690.81 = 5,690.81 : x
2. Step 2: Convert to fraction form
   3,806.72/5,690.81 = 5,690.81/x
3. Step 3: Cross multiply
   3,806.72x = 5,690.81 × 5,690.81
4. Step 4: Simplify right side
   3,806.72x = 32,385,346.91
5. Step 5: Solve for x
   x = 32,385,346.91/3,806.72
6. Step 6: Final answer
   x = 8,507.42