Finding the Third Proportional to 139,588 and 286,568

Step by Step Solution

1. Step 1: Write the proportion equation
   139,588 : 286,568 = 286,568 : x
2. Step 2: Convert to fraction form
   139,588/286,568 = 286,568/x
3. Step 3: Cross multiply
   139,588x = 286,568 × 286,568
4. Step 4: Simplify right side
   139,588x = 82,121,218,624
5. Step 5: Solve for x
   x = 82,121,218,624/139,588
6. Step 6: Final answer
   x = 588,311.45