Finding the Third Proportional to 853,212 and 1,867,128

Step by Step Solution

1. Step 1: Write the proportion equation
   853,212 : 1,867,128 = 1,867,128 : x
2. Step 2: Convert to fraction form
   853,212/1,867,128 = 1,867,128/x
3. Step 3: Cross multiply
   853,212x = 1,867,128 × 1,867,128
4. Step 4: Simplify right side
   853,212x = 3,486,166,968,384
5. Step 5: Solve for x
   x = 3,486,166,968,384/853,212
6. Step 6: Final answer
   x = 4,085,932.88