Finding the Third Proportional to 775,624 and 1,621,516

Step by Step Solution

1. Step 1: Write the proportion equation
   775,624 : 1,621,516 = 1,621,516 : x
2. Step 2: Convert to fraction form
   775,624/1,621,516 = 1,621,516/x
3. Step 3: Cross multiply
   775,624x = 1,621,516 × 1,621,516
4. Step 4: Simplify right side
   775,624x = 2,629,314,138,256
5. Step 5: Solve for x
   x = 2,629,314,138,256/775,624
6. Step 6: Final answer
   x = 3,389,933.96