Finding the Third Proportional to 1,390.88 and 2,114.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390.88 : 2,114.06 = 2,114.06 : x
2. Step 2: Convert to fraction form
   1,390.88/2,114.06 = 2,114.06/x
3. Step 3: Cross multiply
   1,390.88x = 2,114.06 × 2,114.06
4. Step 4: Simplify right side
   1,390.88x = 4,469,260.25
5. Step 5: Solve for x
   x = 4,469,260.25/1,390.88
6. Step 6: Final answer
   x = 3,213.27