Finding the Third Proportional to 72,189.50 and 173,913

Step by Step Solution

1. Step 1: Write the proportion equation
   72,189.50 : 173,913 = 173,913 : x
2. Step 2: Convert to fraction form
   72,189.50/173,913 = 173,913/x
3. Step 3: Cross multiply
   72,189.50x = 173,913 × 173,913
4. Step 4: Simplify right side
   72,189.50x = 30,245,731,569
5. Step 5: Solve for x
   x = 30,245,731,569/72,189.50
6. Step 6: Final answer
   x = 418,976.88