Finding the Third Proportional to 139,172 and 298,016

Step by Step Solution

1. Step 1: Write the proportion equation
   139,172 : 298,016 = 298,016 : x
2. Step 2: Convert to fraction form
   139,172/298,016 = 298,016/x
3. Step 3: Cross multiply
   139,172x = 298,016 × 298,016
4. Step 4: Simplify right side
   139,172x = 88,813,536,256
5. Step 5: Solve for x
   x = 88,813,536,256/139,172
6. Step 6: Final answer
   x = 638,156.64