Finding the Third Proportional to 611,580 and 1,381,719

Step by Step Solution

1. Step 1: Write the proportion equation
   611,580 : 1,381,719 = 1,381,719 : x
2. Step 2: Convert to fraction form
   611,580/1,381,719 = 1,381,719/x
3. Step 3: Cross multiply
   611,580x = 1,381,719 × 1,381,719
4. Step 4: Simplify right side
   611,580x = 1,909,147,394,961
5. Step 5: Solve for x
   x = 1,909,147,394,961/611,580
6. Step 6: Final answer
   x = 3,121,664.21