Finding the Third Proportional to 231,128 and 345,732

Step by Step Solution

1. Step 1: Write the proportion equation
   231,128 : 345,732 = 345,732 : x
2. Step 2: Convert to fraction form
   231,128/345,732 = 345,732/x
3. Step 3: Cross multiply
   231,128x = 345,732 × 345,732
4. Step 4: Simplify right side
   231,128x = 119,530,615,824
5. Step 5: Solve for x
   x = 119,530,615,824/231,128
6. Step 6: Final answer
   x = 517,161.99