Finding the Third Proportional to 1,071,240 and 1,421,694

Step by Step Solution

1. Step 1: Write the proportion equation
   1,071,240 : 1,421,694 = 1,421,694 : x
2. Step 2: Convert to fraction form
   1,071,240/1,421,694 = 1,421,694/x
3. Step 3: Cross multiply
   1,071,240x = 1,421,694 × 1,421,694
4. Step 4: Simplify right side
   1,071,240x = 2,021,213,829,636
5. Step 5: Solve for x
   x = 2,021,213,829,636/1,071,240
6. Step 6: Final answer
   x = 1,886,798.32