Finding the Third Proportional to 611,913 and 860,185.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,913 : 860,185.50 = 860,185.50 : x
2. Step 2: Convert to fraction form
   611,913/860,185.50 = 860,185.50/x
3. Step 3: Cross multiply
   611,913x = 860,185.50 × 860,185.50
4. Step 4: Simplify right side
   611,913x = 739,919,094,410.25
5. Step 5: Solve for x
   x = 739,919,094,410.25/611,913
6. Step 6: Final answer
   x = 1,209,190.02