Finding the Third Proportional to 142,308 and 300,289

Step by Step Solution

1. Step 1: Write the proportion equation
   142,308 : 300,289 = 300,289 : x
2. Step 2: Convert to fraction form
   142,308/300,289 = 300,289/x
3. Step 3: Cross multiply
   142,308x = 300,289 × 300,289
4. Step 4: Simplify right side
   142,308x = 90,173,483,521
5. Step 5: Solve for x
   x = 90,173,483,521/142,308
6. Step 6: Final answer
   x = 633,650.14