Finding the Third Proportional to 678,017 and 920,823.50

Step by Step Solution

1. Step 1: Write the proportion equation
   678,017 : 920,823.50 = 920,823.50 : x
2. Step 2: Convert to fraction form
   678,017/920,823.50 = 920,823.50/x
3. Step 3: Cross multiply
   678,017x = 920,823.50 × 920,823.50
4. Step 4: Simplify right side
   678,017x = 847,915,918,152.25
5. Step 5: Solve for x
   x = 847,915,918,152.25/678,017
6. Step 6: Final answer
   x = 1,250,582.09