Finding the Third Proportional to 200,351 and 423,058

Step by Step Solution

1. Step 1: Write the proportion equation
   200,351 : 423,058 = 423,058 : x
2. Step 2: Convert to fraction form
   200,351/423,058 = 423,058/x
3. Step 3: Cross multiply
   200,351x = 423,058 × 423,058
4. Step 4: Simplify right side
   200,351x = 178,978,071,364
5. Step 5: Solve for x
   x = 178,978,071,364/200,351
6. Step 6: Final answer
   x = 893,322.58