Finding the Third Proportional to 139,000 and 299,616

Step by Step Solution

1. Step 1: Write the proportion equation
   139,000 : 299,616 = 299,616 : x
2. Step 2: Convert to fraction form
   139,000/299,616 = 299,616/x
3. Step 3: Cross multiply
   139,000x = 299,616 × 299,616
4. Step 4: Simplify right side
   139,000x = 89,769,747,456
5. Step 5: Solve for x
   x = 89,769,747,456/139,000
6. Step 6: Final answer
   x = 645,825.52