Finding the Third Proportional to 195,692 and 428,890

Step by Step Solution

1. Step 1: Write the proportion equation
   195,692 : 428,890 = 428,890 : x
2. Step 2: Convert to fraction form
   195,692/428,890 = 428,890/x
3. Step 3: Cross multiply
   195,692x = 428,890 × 428,890
4. Step 4: Simplify right side
   195,692x = 183,946,632,100
5. Step 5: Solve for x
   x = 183,946,632,100/195,692
6. Step 6: Final answer
   x = 939,980.34