Finding the Third Proportional to 129,459 and 174,908.25

Step by Step Solution

1. Step 1: Write the proportion equation
   129,459 : 174,908.25 = 174,908.25 : x
2. Step 2: Convert to fraction form
   129,459/174,908.25 = 174,908.25/x
3. Step 3: Cross multiply
   129,459x = 174,908.25 × 174,908.25
4. Step 4: Simplify right side
   129,459x = 30,592,895,918.06
5. Step 5: Solve for x
   x = 30,592,895,918.06/129,459
6. Step 6: Final answer
   x = 236,313.40