Finding the Third Proportional to 139,890 and 302,116

Step by Step Solution

1. Step 1: Write the proportion equation
   139,890 : 302,116 = 302,116 : x
2. Step 2: Convert to fraction form
   139,890/302,116 = 302,116/x
3. Step 3: Cross multiply
   139,890x = 302,116 × 302,116
4. Step 4: Simplify right side
   139,890x = 91,274,077,456
5. Step 5: Solve for x
   x = 91,274,077,456/139,890
6. Step 6: Final answer
   x = 652,470.35