Finding the Third Proportional to 147,429 and 315,891

Step by Step Solution

1. Step 1: Write the proportion equation
   147,429 : 315,891 = 315,891 : x
2. Step 2: Convert to fraction form
   147,429/315,891 = 315,891/x
3. Step 3: Cross multiply
   147,429x = 315,891 × 315,891
4. Step 4: Simplify right side
   147,429x = 99,787,123,881
5. Step 5: Solve for x
   x = 99,787,123,881/147,429
6. Step 6: Final answer
   x = 676,848.68