Finding the Third Proportional to 189,986 and 417,892

Step by Step Solution

1. Step 1: Write the proportion equation
   189,986 : 417,892 = 417,892 : x
2. Step 2: Convert to fraction form
   189,986/417,892 = 417,892/x
3. Step 3: Cross multiply
   189,986x = 417,892 × 417,892
4. Step 4: Simplify right side
   189,986x = 174,633,723,664
5. Step 5: Solve for x
   x = 174,633,723,664/189,986
6. Step 6: Final answer
   x = 919,192.59