Finding the Third Proportional to 189,496 and 405,250

Step by Step Solution

1. Step 1: Write the proportion equation
   189,496 : 405,250 = 405,250 : x
2. Step 2: Convert to fraction form
   189,496/405,250 = 405,250/x
3. Step 3: Cross multiply
   189,496x = 405,250 × 405,250
4. Step 4: Simplify right side
   189,496x = 164,227,562,500
5. Step 5: Solve for x
   x = 164,227,562,500/189,496
6. Step 6: Final answer
   x = 866,654.51