Finding the Third Proportional to 1,115,866 and 1,621,959

Step by Step Solution

1. Step 1: Write the proportion equation
   1,115,866 : 1,621,959 = 1,621,959 : x
2. Step 2: Convert to fraction form
   1,115,866/1,621,959 = 1,621,959/x
3. Step 3: Cross multiply
   1,115,866x = 1,621,959 × 1,621,959
4. Step 4: Simplify right side
   1,115,866x = 2,630,750,997,681
5. Step 5: Solve for x
   x = 2,630,750,997,681/1,115,866
6. Step 6: Final answer
   x = 2,357,586.84