Finding the Third Proportional to 210,014 and 336,890

Step by Step Solution

1. Step 1: Write the proportion equation
   210,014 : 336,890 = 336,890 : x
2. Step 2: Convert to fraction form
   210,014/336,890 = 336,890/x
3. Step 3: Cross multiply
   210,014x = 336,890 × 336,890
4. Step 4: Simplify right side
   210,014x = 113,494,872,100
5. Step 5: Solve for x
   x = 113,494,872,100/210,014
6. Step 6: Final answer
   x = 540,415.74