Finding the Third Proportional to 2,190.66 and 3,308.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,190.66 : 3,308.91 = 3,308.91 : x
2. Step 2: Convert to fraction form
   2,190.66/3,308.91 = 3,308.91/x
3. Step 3: Cross multiply
   2,190.66x = 3,308.91 × 3,308.91
4. Step 4: Simplify right side
   2,190.66x = 10,948,860.57
5. Step 5: Solve for x
   x = 10,948,860.57/2,190.66
6. Step 6: Final answer
   x = 4,997.98