Finding the Third Proportional to 858,698 and 1,865,018

Step by Step Solution

1. Step 1: Write the proportion equation
   858,698 : 1,865,018 = 1,865,018 : x
2. Step 2: Convert to fraction form
   858,698/1,865,018 = 1,865,018/x
3. Step 3: Cross multiply
   858,698x = 1,865,018 × 1,865,018
4. Step 4: Simplify right side
   858,698x = 3,478,292,140,324
5. Step 5: Solve for x
   x = 3,478,292,140,324/858,698
6. Step 6: Final answer
   x = 4,050,658.25