Finding the Third Proportional to 228,390 and 491,700

Step by Step Solution

1. Step 1: Write the proportion equation
   228,390 : 491,700 = 491,700 : x
2. Step 2: Convert to fraction form
   228,390/491,700 = 491,700/x
3. Step 3: Cross multiply
   228,390x = 491,700 × 491,700
4. Step 4: Simplify right side
   228,390x = 241,768,890,000
5. Step 5: Solve for x
   x = 241,768,890,000/228,390
6. Step 6: Final answer
   x = 1,058,579.14