Finding the Third Proportional to 189,300 and 401,976

Step by Step Solution

1. Step 1: Write the proportion equation
   189,300 : 401,976 = 401,976 : x
2. Step 2: Convert to fraction form
   189,300/401,976 = 401,976/x
3. Step 3: Cross multiply
   189,300x = 401,976 × 401,976
4. Step 4: Simplify right side
   189,300x = 161,584,704,576
5. Step 5: Solve for x
   x = 161,584,704,576/189,300
6. Step 6: Final answer
   x = 853,590.62