Finding the Third Proportional to 611,807 and 1,312,210

Step by Step Solution

1. Step 1: Write the proportion equation
   611,807 : 1,312,210 = 1,312,210 : x
2. Step 2: Convert to fraction form
   611,807/1,312,210 = 1,312,210/x
3. Step 3: Cross multiply
   611,807x = 1,312,210 × 1,312,210
4. Step 4: Simplify right side
   611,807x = 1,721,895,084,100
5. Step 5: Solve for x
   x = 1,721,895,084,100/611,807
6. Step 6: Final answer
   x = 2,814,441.62