Finding the Third Proportional to 148,106 and 315,920

Step by Step Solution

1. Step 1: Write the proportion equation
   148,106 : 315,920 = 315,920 : x
2. Step 2: Convert to fraction form
   148,106/315,920 = 315,920/x
3. Step 3: Cross multiply
   148,106x = 315,920 × 315,920
4. Step 4: Simplify right side
   148,106x = 99,805,446,400
5. Step 5: Solve for x
   x = 99,805,446,400/148,106
6. Step 6: Final answer
   x = 673,878.48