Finding the Third Proportional to 1,430,212 and 2,120,578

Step by Step Solution

1. Step 1: Write the proportion equation
   1,430,212 : 2,120,578 = 2,120,578 : x
2. Step 2: Convert to fraction form
   1,430,212/2,120,578 = 2,120,578/x
3. Step 3: Cross multiply
   1,430,212x = 2,120,578 × 2,120,578
4. Step 4: Simplify right side
   1,430,212x = 4,496,851,054,084
5. Step 5: Solve for x
   x = 4,496,851,054,084/1,430,212
6. Step 6: Final answer
   x = 3,144,184.96