Finding the Third Proportional to 611,805 and 1,312,155

Step by Step Solution

1. Step 1: Write the proportion equation
   611,805 : 1,312,155 = 1,312,155 : x
2. Step 2: Convert to fraction form
   611,805/1,312,155 = 1,312,155/x
3. Step 3: Cross multiply
   611,805x = 1,312,155 × 1,312,155
4. Step 4: Simplify right side
   611,805x = 1,721,750,744,025
5. Step 5: Solve for x
   x = 1,721,750,744,025/611,805
6. Step 6: Final answer
   x = 2,814,214.90