Finding the Third Proportional to 1,205,820 and 1,866,260

Step by Step Solution

1. Step 1: Write the proportion equation
   1,205,820 : 1,866,260 = 1,866,260 : x
2. Step 2: Convert to fraction form
   1,205,820/1,866,260 = 1,866,260/x
3. Step 3: Cross multiply
   1,205,820x = 1,866,260 × 1,866,260
4. Step 4: Simplify right side
   1,205,820x = 3,482,926,387,600
5. Step 5: Solve for x
   x = 3,482,926,387,600/1,205,820
6. Step 6: Final answer
   x = 2,888,429.77