Finding the Third Proportional to 395,689.50 and 851,377.50

Step by Step Solution

1. Step 1: Write the proportion equation
   395,689.50 : 851,377.50 = 851,377.50 : x
2. Step 2: Convert to fraction form
   395,689.50/851,377.50 = 851,377.50/x
3. Step 3: Cross multiply
   395,689.50x = 851,377.50 × 851,377.50
4. Step 4: Simplify right side
   395,689.50x = 724,843,647,506.25
5. Step 5: Solve for x
   x = 724,843,647,506.25/395,689.50
6. Step 6: Final answer
   x = 1,831,849.59