Finding the Third Proportional to 189,620 and 438,976

Step by Step Solution

1. Step 1: Write the proportion equation
   189,620 : 438,976 = 438,976 : x
2. Step 2: Convert to fraction form
   189,620/438,976 = 438,976/x
3. Step 3: Cross multiply
   189,620x = 438,976 × 438,976
4. Step 4: Simplify right side
   189,620x = 192,699,928,576
5. Step 5: Solve for x
   x = 192,699,928,576/189,620
6. Step 6: Final answer
   x = 1,016,242.64