Finding the Third Proportional to 858,521 and 1,864,658

Step by Step Solution

1. Step 1: Write the proportion equation
   858,521 : 1,864,658 = 1,864,658 : x
2. Step 2: Convert to fraction form
   858,521/1,864,658 = 1,864,658/x
3. Step 3: Cross multiply
   858,521x = 1,864,658 × 1,864,658
4. Step 4: Simplify right side
   858,521x = 3,476,949,456,964
5. Step 5: Solve for x
   x = 3,476,949,456,964/858,521
6. Step 6: Final answer
   x = 4,049,929.42