Finding the Third Proportional to 659,222.25 and 990,588

Step by Step Solution

1. Step 1: Write the proportion equation
   659,222.25 : 990,588 = 990,588 : x
2. Step 2: Convert to fraction form
   659,222.25/990,588 = 990,588/x
3. Step 3: Cross multiply
   659,222.25x = 990,588 × 990,588
4. Step 4: Simplify right side
   659,222.25x = 981,264,585,744
5. Step 5: Solve for x
   x = 981,264,585,744/659,222.25
6. Step 6: Final answer
   x = 1,488,518.61