Finding the Third Proportional to 611,912 and 860,184.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,912 : 860,184.50 = 860,184.50 : x
2. Step 2: Convert to fraction form
   611,912/860,184.50 = 860,184.50/x
3. Step 3: Cross multiply
   611,912x = 860,184.50 × 860,184.50
4. Step 4: Simplify right side
   611,912x = 739,917,374,040.25
5. Step 5: Solve for x
   x = 739,917,374,040.25/611,912
6. Step 6: Final answer
   x = 1,209,189.19