Finding the Third Proportional to 398,776.50 and 860,166

Step by Step Solution

1. Step 1: Write the proportion equation
   398,776.50 : 860,166 = 860,166 : x
2. Step 2: Convert to fraction form
   398,776.50/860,166 = 860,166/x
3. Step 3: Cross multiply
   398,776.50x = 860,166 × 860,166
4. Step 4: Simplify right side
   398,776.50x = 739,885,547,556
5. Step 5: Solve for x
   x = 739,885,547,556/398,776.50
6. Step 6: Final answer
   x = 1,855,389.04