Finding the Third Proportional to 1,011,643 and 2,116,820

Step by Step Solution

1. Step 1: Write the proportion equation
   1,011,643 : 2,116,820 = 2,116,820 : x
2. Step 2: Convert to fraction form
   1,011,643/2,116,820 = 2,116,820/x
3. Step 3: Cross multiply
   1,011,643x = 2,116,820 × 2,116,820
4. Step 4: Simplify right side
   1,011,643x = 4,480,926,912,400
5. Step 5: Solve for x
   x = 4,480,926,912,400/1,011,643
6. Step 6: Final answer
   x = 4,429,355.92