Finding the Third Proportional to 1,207,229 and 2,558,389

Step by Step Solution

1. Step 1: Write the proportion equation
   1,207,229 : 2,558,389 = 2,558,389 : x
2. Step 2: Convert to fraction form
   1,207,229/2,558,389 = 2,558,389/x
3. Step 3: Cross multiply
   1,207,229x = 2,558,389 × 2,558,389
4. Step 4: Simplify right side
   1,207,229x = 6,545,354,275,321
5. Step 5: Solve for x
   x = 6,545,354,275,321/1,207,229
6. Step 6: Final answer
   x = 5,421,800.07