Finding the Third Proportional to 290,814 and 608,116

Step by Step Solution

1. Step 1: Write the proportion equation
   290,814 : 608,116 = 608,116 : x
2. Step 2: Convert to fraction form
   290,814/608,116 = 608,116/x
3. Step 3: Cross multiply
   290,814x = 608,116 × 608,116
4. Step 4: Simplify right side
   290,814x = 369,805,069,456
5. Step 5: Solve for x
   x = 369,805,069,456/290,814
6. Step 6: Final answer
   x = 1,271,620.59