Finding the Third Proportional to 231,687 and 345,501

Step by Step Solution

1. Step 1: Write the proportion equation
   231,687 : 345,501 = 345,501 : x
2. Step 2: Convert to fraction form
   231,687/345,501 = 345,501/x
3. Step 3: Cross multiply
   231,687x = 345,501 × 345,501
4. Step 4: Simplify right side
   231,687x = 119,370,941,001
5. Step 5: Solve for x
   x = 119,370,941,001/231,687
6. Step 6: Final answer
   x = 515,225.03