Finding the Third Proportional to 1,681,218 and 3,648,216

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681,218 : 3,648,216 = 3,648,216 : x
2. Step 2: Convert to fraction form
   1,681,218/3,648,216 = 3,648,216/x
3. Step 3: Cross multiply
   1,681,218x = 3,648,216 × 3,648,216
4. Step 4: Simplify right side
   1,681,218x = 13,309,479,982,656
5. Step 5: Solve for x
   x = 13,309,479,982,656/1,681,218
6. Step 6: Final answer
   x = 7,916,570.00