Finding the Third Proportional to 139,875 and 210,980

Step by Step Solution

1. Step 1: Write the proportion equation
   139,875 : 210,980 = 210,980 : x
2. Step 2: Convert to fraction form
   139,875/210,980 = 210,980/x
3. Step 3: Cross multiply
   139,875x = 210,980 × 210,980
4. Step 4: Simplify right side
   139,875x = 44,512,560,400
5. Step 5: Solve for x
   x = 44,512,560,400/139,875
6. Step 6: Final answer
   x = 318,230.99