Finding the Third Proportional to 1,681,221 and 3,648,222

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681,221 : 3,648,222 = 3,648,222 : x
2. Step 2: Convert to fraction form
   1,681,221/3,648,222 = 3,648,222/x
3. Step 3: Cross multiply
   1,681,221x = 3,648,222 × 3,648,222
4. Step 4: Simplify right side
   1,681,221x = 13,309,523,761,284
5. Step 5: Solve for x
   x = 13,309,523,761,284/1,681,221
6. Step 6: Final answer
   x = 7,916,581.91