Finding the Third Proportional to 231,016.50 and 345,585

Step by Step Solution

1. Step 1: Write the proportion equation
   231,016.50 : 345,585 = 345,585 : x
2. Step 2: Convert to fraction form
   231,016.50/345,585 = 345,585/x
3. Step 3: Cross multiply
   231,016.50x = 345,585 × 345,585
4. Step 4: Simplify right side
   231,016.50x = 119,428,992,225
5. Step 5: Solve for x
   x = 119,428,992,225/231,016.50
6. Step 6: Final answer
   x = 516,971.70