Finding the Third Proportional to 139,108 and 299,810

Step by Step Solution

1. Step 1: Write the proportion equation
   139,108 : 299,810 = 299,810 : x
2. Step 2: Convert to fraction form
   139,108/299,810 = 299,810/x
3. Step 3: Cross multiply
   139,108x = 299,810 × 299,810
4. Step 4: Simplify right side
   139,108x = 89,886,036,100
5. Step 5: Solve for x
   x = 89,886,036,100/139,108
6. Step 6: Final answer
   x = 646,160.08