Finding the Third Proportional to 290,900 and 617,014

Step by Step Solution

1. Step 1: Write the proportion equation
   290,900 : 617,014 = 617,014 : x
2. Step 2: Convert to fraction form
   290,900/617,014 = 617,014/x
3. Step 3: Cross multiply
   290,900x = 617,014 × 617,014
4. Step 4: Simplify right side
   290,900x = 380,706,276,196
5. Step 5: Solve for x
   x = 380,706,276,196/290,900
6. Step 6: Final answer
   x = 1,308,718.72