Finding the Third Proportional to 520,636 and 804,550

Step by Step Solution

1. Step 1: Write the proportion equation
   520,636 : 804,550 = 804,550 : x
2. Step 2: Convert to fraction form
   520,636/804,550 = 804,550/x
3. Step 3: Cross multiply
   520,636x = 804,550 × 804,550
4. Step 4: Simplify right side
   520,636x = 647,300,702,500
5. Step 5: Solve for x
   x = 647,300,702,500/520,636
6. Step 6: Final answer
   x = 1,243,288.41