Finding the Third Proportional to 398,313 and 860,010

Step by Step Solution

1. Step 1: Write the proportion equation
   398,313 : 860,010 = 860,010 : x
2. Step 2: Convert to fraction form
   398,313/860,010 = 860,010/x
3. Step 3: Cross multiply
   398,313x = 860,010 × 860,010
4. Step 4: Simplify right side
   398,313x = 739,617,200,100
5. Step 5: Solve for x
   x = 739,617,200,100/398,313
6. Step 6: Final answer
   x = 1,856,874.37