Finding the Third Proportional to 393,457.50 and 705,936

Step by Step Solution

1. Step 1: Write the proportion equation
   393,457.50 : 705,936 = 705,936 : x
2. Step 2: Convert to fraction form
   393,457.50/705,936 = 705,936/x
3. Step 3: Cross multiply
   393,457.50x = 705,936 × 705,936
4. Step 4: Simplify right side
   393,457.50x = 498,345,636,096
5. Step 5: Solve for x
   x = 498,345,636,096/393,457.50
6. Step 6: Final answer
   x = 1,266,580.60