Finding the Third Proportional to 139,518 and 305,116

Step by Step Solution

1. Step 1: Write the proportion equation
   139,518 : 305,116 = 305,116 : x
2. Step 2: Convert to fraction form
   139,518/305,116 = 305,116/x
3. Step 3: Cross multiply
   139,518x = 305,116 × 305,116
4. Step 4: Simplify right side
   139,518x = 93,095,773,456
5. Step 5: Solve for x
   x = 93,095,773,456/139,518
6. Step 6: Final answer
   x = 667,267.12