Finding the Third Proportional to 290,524 and 400,068

Step by Step Solution

1. Step 1: Write the proportion equation
   290,524 : 400,068 = 400,068 : x
2. Step 2: Convert to fraction form
   290,524/400,068 = 400,068/x
3. Step 3: Cross multiply
   290,524x = 400,068 × 400,068
4. Step 4: Simplify right side
   290,524x = 160,054,404,624
5. Step 5: Solve for x
   x = 160,054,404,624/290,524
6. Step 6: Final answer
   x = 550,916.29