Finding the Third Proportional to 393,715.69 and 843,196.50

Step by Step Solution

1. Step 1: Write the proportion equation
   393,715.69 : 843,196.50 = 843,196.50 : x
2. Step 2: Convert to fraction form
   393,715.69/843,196.50 = 843,196.50/x
3. Step 3: Cross multiply
   393,715.69x = 843,196.50 × 843,196.50
4. Step 4: Simplify right side
   393,715.69x = 710,980,337,612.25
5. Step 5: Solve for x
   x = 710,980,337,612.25/393,715.69
6. Step 6: Final answer
   x = 1,805,821.71