Finding the Third Proportional to 121,061 and 200,072

Step by Step Solution

1. Step 1: Write the proportion equation
   121,061 : 200,072 = 200,072 : x
2. Step 2: Convert to fraction form
   121,061/200,072 = 200,072/x
3. Step 3: Cross multiply
   121,061x = 200,072 × 200,072
4. Step 4: Simplify right side
   121,061x = 40,028,805,184
5. Step 5: Solve for x
   x = 40,028,805,184/121,061
6. Step 6: Final answer
   x = 330,649.88