Finding the Third Proportional to 151,603.50 and 311,949

Step by Step Solution

1. Step 1: Write the proportion equation
   151,603.50 : 311,949 = 311,949 : x
2. Step 2: Convert to fraction form
   151,603.50/311,949 = 311,949/x
3. Step 3: Cross multiply
   151,603.50x = 311,949 × 311,949
4. Step 4: Simplify right side
   151,603.50x = 97,312,178,601
5. Step 5: Solve for x
   x = 97,312,178,601/151,603.50
6. Step 6: Final answer
   x = 641,886.09