Finding the Third Proportional to 789.50 and 1,223

Step by Step Solution

1. Step 1: Write the proportion equation
   789.50 : 1,223 = 1,223 : x
2. Step 2: Convert to fraction form
   789.50/1,223 = 1,223/x
3. Step 3: Cross multiply
   789.50x = 1,223 × 1,223
4. Step 4: Simplify right side
   789.50x = 1,495,729
5. Step 5: Solve for x
   x = 1,495,729/789.50
6. Step 6: Final answer
   x = 1,894.53