Finding the Third Proportional to 308,142 and 662,274

Step by Step Solution

1. Step 1: Write the proportion equation
   308,142 : 662,274 = 662,274 : x
2. Step 2: Convert to fraction form
   308,142/662,274 = 662,274/x
3. Step 3: Cross multiply
   308,142x = 662,274 × 662,274
4. Step 4: Simplify right side
   308,142x = 438,606,851,076
5. Step 5: Solve for x
   x = 438,606,851,076/308,142
6. Step 6: Final answer
   x = 1,423,391.98