Finding the Third Proportional to 231,013.50 and 345,580.50

Step by Step Solution

1. Step 1: Write the proportion equation
   231,013.50 : 345,580.50 = 345,580.50 : x
2. Step 2: Convert to fraction form
   231,013.50/345,580.50 = 345,580.50/x
3. Step 3: Cross multiply
   231,013.50x = 345,580.50 × 345,580.50
4. Step 4: Simplify right side
   231,013.50x = 119,425,881,980.25
5. Step 5: Solve for x
   x = 119,425,881,980.25/231,013.50
6. Step 6: Final answer
   x = 516,964.95