Finding the Third Proportional to 398,335.50 and 860,058

Step by Step Solution

1. Step 1: Write the proportion equation
   398,335.50 : 860,058 = 860,058 : x
2. Step 2: Convert to fraction form
   398,335.50/860,058 = 860,058/x
3. Step 3: Cross multiply
   398,335.50x = 860,058 × 860,058
4. Step 4: Simplify right side
   398,335.50x = 739,699,763,364
5. Step 5: Solve for x
   x = 739,699,763,364/398,335.50
6. Step 6: Final answer
   x = 1,856,976.75