Finding the Third Proportional to 300,290 and 654,148

Step by Step Solution

1. Step 1: Write the proportion equation
   300,290 : 654,148 = 654,148 : x
2. Step 2: Convert to fraction form
   300,290/654,148 = 654,148/x
3. Step 3: Cross multiply
   300,290x = 654,148 × 654,148
4. Step 4: Simplify right side
   300,290x = 427,909,605,904
5. Step 5: Solve for x
   x = 427,909,605,904/300,290
6. Step 6: Final answer
   x = 1,424,987.86