Finding the Third Proportional to 290,882 and 426,747

Step by Step Solution

1. Step 1: Write the proportion equation
   290,882 : 426,747 = 426,747 : x
2. Step 2: Convert to fraction form
   290,882/426,747 = 426,747/x
3. Step 3: Cross multiply
   290,882x = 426,747 × 426,747
4. Step 4: Simplify right side
   290,882x = 182,113,002,009
5. Step 5: Solve for x
   x = 182,113,002,009/290,882
6. Step 6: Final answer
   x = 626,071.75