Finding the Third Proportional to 398,602.50 and 867,189

Step by Step Solution

1. Step 1: Write the proportion equation
   398,602.50 : 867,189 = 867,189 : x
2. Step 2: Convert to fraction form
   398,602.50/867,189 = 867,189/x
3. Step 3: Cross multiply
   398,602.50x = 867,189 × 867,189
4. Step 4: Simplify right side
   398,602.50x = 752,016,761,721
5. Step 5: Solve for x
   x = 752,016,761,721/398,602.50
6. Step 6: Final answer
   x = 1,886,633.33