Finding the Third Proportional to 2,122.45 and 3,086.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,122.45 : 3,086.86 = 3,086.86 : x
2. Step 2: Convert to fraction form
   2,122.45/3,086.86 = 3,086.86/x
3. Step 3: Cross multiply
   2,122.45x = 3,086.86 × 3,086.86
4. Step 4: Simplify right side
   2,122.45x = 9,528,700.80
5. Step 5: Solve for x
   x = 9,528,700.80/2,122.45
6. Step 6: Final answer
   x = 4,489.48