Finding the Third Proportional to 1,421,910 and 2,180,370

Step by Step Solution

1. Step 1: Write the proportion equation
   1,421,910 : 2,180,370 = 2,180,370 : x
2. Step 2: Convert to fraction form
   1,421,910/2,180,370 = 2,180,370/x
3. Step 3: Cross multiply
   1,421,910x = 2,180,370 × 2,180,370
4. Step 4: Simplify right side
   1,421,910x = 4,754,013,336,900
5. Step 5: Solve for x
   x = 4,754,013,336,900/1,421,910
6. Step 6: Final answer
   x = 3,343,399.61