Finding the Third Proportional to 291,616 and 606,499

Step by Step Solution

1. Step 1: Write the proportion equation
   291,616 : 606,499 = 606,499 : x
2. Step 2: Convert to fraction form
   291,616/606,499 = 606,499/x
3. Step 3: Cross multiply
   291,616x = 606,499 × 606,499
4. Step 4: Simplify right side
   291,616x = 367,841,037,001
5. Step 5: Solve for x
   x = 367,841,037,001/291,616
6. Step 6: Final answer
   x = 1,261,388.39