Finding the Third Proportional to 196,900 and 429,890

Step by Step Solution

1. Step 1: Write the proportion equation
   196,900 : 429,890 = 429,890 : x
2. Step 2: Convert to fraction form
   196,900/429,890 = 429,890/x
3. Step 3: Cross multiply
   196,900x = 429,890 × 429,890
4. Step 4: Simplify right side
   196,900x = 184,805,412,100
5. Step 5: Solve for x
   x = 184,805,412,100/196,900
6. Step 6: Final answer
   x = 938,574.97