Finding the Third Proportional to 286,563 and 587,490

Step by Step Solution

1. Step 1: Write the proportion equation
   286,563 : 587,490 = 587,490 : x
2. Step 2: Convert to fraction form
   286,563/587,490 = 587,490/x
3. Step 3: Cross multiply
   286,563x = 587,490 × 587,490
4. Step 4: Simplify right side
   286,563x = 345,144,500,100
5. Step 5: Solve for x
   x = 345,144,500,100/286,563
6. Step 6: Final answer
   x = 1,204,428.00