Finding the Third Proportional to 612,099 and 860,446.50

Step by Step Solution

1. Step 1: Write the proportion equation
   612,099 : 860,446.50 = 860,446.50 : x
2. Step 2: Convert to fraction form
   612,099/860,446.50 = 860,446.50/x
3. Step 3: Cross multiply
   612,099x = 860,446.50 × 860,446.50
4. Step 4: Simplify right side
   612,099x = 740,368,179,362.25
5. Step 5: Solve for x
   x = 740,368,179,362.25/612,099
6. Step 6: Final answer
   x = 1,209,556.26