Finding the Third Proportional to 290,800.50 and 627,429

Step by Step Solution

1. Step 1: Write the proportion equation
   290,800.50 : 627,429 = 627,429 : x
2. Step 2: Convert to fraction form
   290,800.50/627,429 = 627,429/x
3. Step 3: Cross multiply
   290,800.50x = 627,429 × 627,429
4. Step 4: Simplify right side
   290,800.50x = 393,667,150,041
5. Step 5: Solve for x
   x = 393,667,150,041/290,800.50
6. Step 6: Final answer
   x = 1,353,736.15