Finding the Third Proportional to 1,489.50 and 2,216.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,489.50 : 2,216.63 = 2,216.63 : x
2. Step 2: Convert to fraction form
   1,489.50/2,216.63 = 2,216.63/x
3. Step 3: Cross multiply
   1,489.50x = 2,216.63 × 2,216.63
4. Step 4: Simplify right side
   1,489.50x = 4,913,426.39
5. Step 5: Solve for x
   x = 4,913,426.39/1,489.50
6. Step 6: Final answer
   x = 3,298.71