Finding the Third Proportional to 611,910 and 860,181.75

Step by Step Solution

1. Step 1: Write the proportion equation
   611,910 : 860,181.75 = 860,181.75 : x
2. Step 2: Convert to fraction form
   611,910/860,181.75 = 860,181.75/x
3. Step 3: Cross multiply
   611,910x = 860,181.75 × 860,181.75
4. Step 4: Simplify right side
   611,910x = 739,912,643,033.06
5. Step 5: Solve for x
   x = 739,912,643,033.06/611,910
6. Step 6: Final answer
   x = 1,209,185.41