Finding the Third Proportional to 578,291 and 1,253,118

Step by Step Solution

1. Step 1: Write the proportion equation
   578,291 : 1,253,118 = 1,253,118 : x
2. Step 2: Convert to fraction form
   578,291/1,253,118 = 1,253,118/x
3. Step 3: Cross multiply
   578,291x = 1,253,118 × 1,253,118
4. Step 4: Simplify right side
   578,291x = 1,570,304,721,924
5. Step 5: Solve for x
   x = 1,570,304,721,924/578,291
6. Step 6: Final answer
   x = 2,715,423.07