Finding the Third Proportional to 546,861 and 856,132.50

Step by Step Solution

1. Step 1: Write the proportion equation
   546,861 : 856,132.50 = 856,132.50 : x
2. Step 2: Convert to fraction form
   546,861/856,132.50 = 856,132.50/x
3. Step 3: Cross multiply
   546,861x = 856,132.50 × 856,132.50
4. Step 4: Simplify right side
   546,861x = 732,962,857,556.25
5. Step 5: Solve for x
   x = 732,962,857,556.25/546,861
6. Step 6: Final answer
   x = 1,340,309.25