Finding the Third Proportional to 789.50 and 1,868

Step by Step Solution

1. Step 1: Write the proportion equation
   789.50 : 1,868 = 1,868 : x
2. Step 2: Convert to fraction form
   789.50/1,868 = 1,868/x
3. Step 3: Cross multiply
   789.50x = 1,868 × 1,868
4. Step 4: Simplify right side
   789.50x = 3,489,424
5. Step 5: Solve for x
   x = 3,489,424/789.50
6. Step 6: Final answer
   x = 4,419.79