Finding the Third Proportional to 30,644 and 45,390

Step by Step Solution

1. Step 1: Write the proportion equation
   30,644 : 45,390 = 45,390 : x
2. Step 2: Convert to fraction form
   30,644/45,390 = 45,390/x
3. Step 3: Cross multiply
   30,644x = 45,390 × 45,390
4. Step 4: Simplify right side
   30,644x = 2,060,252,100
5. Step 5: Solve for x
   x = 2,060,252,100/30,644
6. Step 6: Final answer
   x = 67,231.83