Finding the Third Proportional to 142,276 and 310,792

Step by Step Solution

1. Step 1: Write the proportion equation
   142,276 : 310,792 = 310,792 : x
2. Step 2: Convert to fraction form
   142,276/310,792 = 310,792/x
3. Step 3: Cross multiply
   142,276x = 310,792 × 310,792
4. Step 4: Simplify right side
   142,276x = 96,591,667,264
5. Step 5: Solve for x
   x = 96,591,667,264/142,276
6. Step 6: Final answer
   x = 678,903.45