Finding the Third Proportional to 319,042 and 700,978

Step by Step Solution

1. Step 1: Write the proportion equation
   319,042 : 700,978 = 700,978 : x
2. Step 2: Convert to fraction form
   319,042/700,978 = 700,978/x
3. Step 3: Cross multiply
   319,042x = 700,978 × 700,978
4. Step 4: Simplify right side
   319,042x = 491,370,156,484
5. Step 5: Solve for x
   x = 491,370,156,484/319,042
6. Step 6: Final answer
   x = 1,540,142.54