Finding the Third Proportional to 747,216 and 1,621,440

Step by Step Solution

1. Step 1: Write the proportion equation
   747,216 : 1,621,440 = 1,621,440 : x
2. Step 2: Convert to fraction form
   747,216/1,621,440 = 1,621,440/x
3. Step 3: Cross multiply
   747,216x = 1,621,440 × 1,621,440
4. Step 4: Simplify right side
   747,216x = 2,629,067,673,600
5. Step 5: Solve for x
   x = 2,629,067,673,600/747,216
6. Step 6: Final answer
   x = 3,518,484.18