Finding the Third Proportional to 853,191 and 1,200,072

Step by Step Solution

1. Step 1: Write the proportion equation
   853,191 : 1,200,072 = 1,200,072 : x
2. Step 2: Convert to fraction form
   853,191/1,200,072 = 1,200,072/x
3. Step 3: Cross multiply
   853,191x = 1,200,072 × 1,200,072
4. Step 4: Simplify right side
   853,191x = 1,440,172,805,184
5. Step 5: Solve for x
   x = 1,440,172,805,184/853,191
6. Step 6: Final answer
   x = 1,687,984.06