Finding the Third Proportional to 231,129 and 324,526.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,129 : 324,526.50 = 324,526.50 : x
2. Step 2: Convert to fraction form
   231,129/324,526.50 = 324,526.50/x
3. Step 3: Cross multiply
   231,129x = 324,526.50 × 324,526.50
4. Step 4: Simplify right side
   231,129x = 105,317,449,202.25
5. Step 5: Solve for x
   x = 105,317,449,202.25/231,129
6. Step 6: Final answer
   x = 455,665.23