Finding the Third Proportional to 190,420 and 451,140

Step by Step Solution

1. Step 1: Write the proportion equation
   190,420 : 451,140 = 451,140 : x
2. Step 2: Convert to fraction form
   190,420/451,140 = 451,140/x
3. Step 3: Cross multiply
   190,420x = 451,140 × 451,140
4. Step 4: Simplify right side
   190,420x = 203,527,299,600
5. Step 5: Solve for x
   x = 203,527,299,600/190,420
6. Step 6: Final answer
   x = 1,068,833.63