Finding the Third Proportional to 142,056 and 308,412

Step by Step Solution

1. Step 1: Write the proportion equation
   142,056 : 308,412 = 308,412 : x
2. Step 2: Convert to fraction form
   142,056/308,412 = 308,412/x
3. Step 3: Cross multiply
   142,056x = 308,412 × 308,412
4. Step 4: Simplify right side
   142,056x = 95,117,961,744
5. Step 5: Solve for x
   x = 95,117,961,744/142,056
6. Step 6: Final answer
   x = 669,580.74