Finding the Third Proportional to 147,388 and 315,806

Step by Step Solution

1. Step 1: Write the proportion equation
   147,388 : 315,806 = 315,806 : x
2. Step 2: Convert to fraction form
   147,388/315,806 = 315,806/x
3. Step 3: Cross multiply
   147,388x = 315,806 × 315,806
4. Step 4: Simplify right side
   147,388x = 99,733,429,636
5. Step 5: Solve for x
   x = 99,733,429,636/147,388
6. Step 6: Final answer
   x = 676,672.66