Finding the Third Proportional to 611,820 and 860,046.75

Step by Step Solution

1. Step 1: Write the proportion equation
   611,820 : 860,046.75 = 860,046.75 : x
2. Step 2: Convert to fraction form
   611,820/860,046.75 = 860,046.75/x
3. Step 3: Cross multiply
   611,820x = 860,046.75 × 860,046.75
4. Step 4: Simplify right side
   611,820x = 739,680,412,185.56
5. Step 5: Solve for x
   x = 739,680,412,185.56/611,820
6. Step 6: Final answer
   x = 1,208,983.71