Finding the Third Proportional to 321,129 and 759,442.50

Step by Step Solution

1. Step 1: Write the proportion equation
   321,129 : 759,442.50 = 759,442.50 : x
2. Step 2: Convert to fraction form
   321,129/759,442.50 = 759,442.50/x
3. Step 3: Cross multiply
   321,129x = 759,442.50 × 759,442.50
4. Step 4: Simplify right side
   321,129x = 576,752,910,806.25
5. Step 5: Solve for x
   x = 576,752,910,806.25/321,129
6. Step 6: Final answer
   x = 1,796,016.28