Finding the Third Proportional to 189,418.50 and 414,450

Step by Step Solution

1. Step 1: Write the proportion equation
   189,418.50 : 414,450 = 414,450 : x
2. Step 2: Convert to fraction form
   189,418.50/414,450 = 414,450/x
3. Step 3: Cross multiply
   189,418.50x = 414,450 × 414,450
4. Step 4: Simplify right side
   189,418.50x = 171,768,802,500
5. Step 5: Solve for x
   x = 171,768,802,500/189,418.50
6. Step 6: Final answer
   x = 906,821.68