Finding the Third Proportional to 578,690 and 1,267,712

Step by Step Solution

1. Step 1: Write the proportion equation
   578,690 : 1,267,712 = 1,267,712 : x
2. Step 2: Convert to fraction form
   578,690/1,267,712 = 1,267,712/x
3. Step 3: Cross multiply
   578,690x = 1,267,712 × 1,267,712
4. Step 4: Simplify right side
   578,690x = 1,607,093,714,944
5. Step 5: Solve for x
   x = 1,607,093,714,944/578,690
6. Step 6: Final answer
   x = 2,777,123.70