Finding the Third Proportional to 611,858 and 1,312,287

Step by Step Solution

1. Step 1: Write the proportion equation
   611,858 : 1,312,287 = 1,312,287 : x
2. Step 2: Convert to fraction form
   611,858/1,312,287 = 1,312,287/x
3. Step 3: Cross multiply
   611,858x = 1,312,287 × 1,312,287
4. Step 4: Simplify right side
   611,858x = 1,722,097,170,369
5. Step 5: Solve for x
   x = 1,722,097,170,369/611,858
6. Step 6: Final answer
   x = 2,814,537.31