Finding the Third Proportional to 365,530 and 815,107.50

Step by Step Solution

1. Step 1: Write the proportion equation
   365,530 : 815,107.50 = 815,107.50 : x
2. Step 2: Convert to fraction form
   365,530/815,107.50 = 815,107.50/x
3. Step 3: Cross multiply
   365,530x = 815,107.50 × 815,107.50
4. Step 4: Simplify right side
   365,530x = 664,400,236,556.25
5. Step 5: Solve for x
   x = 664,400,236,556.25/365,530
6. Step 6: Final answer
   x = 1,817,635.31