Finding the Third Proportional to 1,234,629 and 1,638,630

Step by Step Solution

1. Step 1: Write the proportion equation
   1,234,629 : 1,638,630 = 1,638,630 : x
2. Step 2: Convert to fraction form
   1,234,629/1,638,630 = 1,638,630/x
3. Step 3: Cross multiply
   1,234,629x = 1,638,630 × 1,638,630
4. Step 4: Simplify right side
   1,234,629x = 2,685,108,276,900
5. Step 5: Solve for x
   x = 2,685,108,276,900/1,234,629
6. Step 6: Final answer
   x = 2,174,830.07