Finding the Third Proportional to 311,971.50 and 445,806

Step by Step Solution

1. Step 1: Write the proportion equation
   311,971.50 : 445,806 = 445,806 : x
2. Step 2: Convert to fraction form
   311,971.50/445,806 = 445,806/x
3. Step 3: Cross multiply
   311,971.50x = 445,806 × 445,806
4. Step 4: Simplify right side
   311,971.50x = 198,742,989,636
5. Step 5: Solve for x
   x = 198,742,989,636/311,971.50
6. Step 6: Final answer
   x = 637,054.95