Finding the Third Proportional to 1,243.00 and 1,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243.00 : 1,864.50 = 1,864.50 : x
2. Step 2: Convert to fraction form
   1,243.00/1,864.50 = 1,864.50/x
3. Step 3: Cross multiply
   1,243.00x = 1,864.50 × 1,864.50
4. Step 4: Simplify right side
   1,243.00x = 3,476,371.17
5. Step 5: Solve for x
   x = 3,476,371.17/1,243.00
6. Step 6: Final answer
   x = 2,796.75