Finding the Third Proportional to 597,590 and 1,290,256

Step by Step Solution

1. Step 1: Write the proportion equation
   597,590 : 1,290,256 = 1,290,256 : x
2. Step 2: Convert to fraction form
   597,590/1,290,256 = 1,290,256/x
3. Step 3: Cross multiply
   597,590x = 1,290,256 × 1,290,256
4. Step 4: Simplify right side
   597,590x = 1,664,760,545,536
5. Step 5: Solve for x
   x = 1,664,760,545,536/597,590
6. Step 6: Final answer
   x = 2,785,790.50