Finding the Third Proportional to 858,543 and 1,864,588

Step by Step Solution

1. Step 1: Write the proportion equation
   858,543 : 1,864,588 = 1,864,588 : x
2. Step 2: Convert to fraction form
   858,543/1,864,588 = 1,864,588/x
3. Step 3: Cross multiply
   858,543x = 1,864,588 × 1,864,588
4. Step 4: Simplify right side
   858,543x = 3,476,688,409,744
5. Step 5: Solve for x
   x = 3,476,688,409,744/858,543
6. Step 6: Final answer
   x = 4,049,521.58