Finding the Third Proportional to 212,431.50 and 345,096

Step by Step Solution

1. Step 1: Write the proportion equation
   212,431.50 : 345,096 = 345,096 : x
2. Step 2: Convert to fraction form
   212,431.50/345,096 = 345,096/x
3. Step 3: Cross multiply
   212,431.50x = 345,096 × 345,096
4. Step 4: Simplify right side
   212,431.50x = 119,091,249,216
5. Step 5: Solve for x
   x = 119,091,249,216/212,431.50
6. Step 6: Final answer
   x = 560,610.12