Finding the Third Proportional to 1,243,312 and 1,889,268

Step by Step Solution

1. Step 1: Write the proportion equation
   1,243,312 : 1,889,268 = 1,889,268 : x
2. Step 2: Convert to fraction form
   1,243,312/1,889,268 = 1,889,268/x
3. Step 3: Cross multiply
   1,243,312x = 1,889,268 × 1,889,268
4. Step 4: Simplify right side
   1,243,312x = 3,569,333,575,824
5. Step 5: Solve for x
   x = 3,569,333,575,824/1,243,312
6. Step 6: Final answer
   x = 2,870,826.93