Finding the Third Proportional to 1,389.94 and 2,113.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389.94 : 2,113.03 = 2,113.03 : x
2. Step 2: Convert to fraction form
   1,389.94/2,113.03 = 2,113.03/x
3. Step 3: Cross multiply
   1,389.94x = 2,113.03 × 2,113.03
4. Step 4: Simplify right side
   1,389.94x = 4,464,901.06
5. Step 5: Solve for x
   x = 4,464,901.06/1,389.94
6. Step 6: Final answer
   x = 3,212.30