Finding the Third Proportional to 920,644 and 1,969,216

Step by Step Solution

1. Step 1: Write the proportion equation
   920,644 : 1,969,216 = 1,969,216 : x
2. Step 2: Convert to fraction form
   920,644/1,969,216 = 1,969,216/x
3. Step 3: Cross multiply
   920,644x = 1,969,216 × 1,969,216
4. Step 4: Simplify right side
   920,644x = 3,877,811,654,656
5. Step 5: Solve for x
   x = 3,877,811,654,656/920,644
6. Step 6: Final answer
   x = 4,212,064.22