Finding the Third Proportional to 72,907 and 158,990

Step by Step Solution

1. Step 1: Write the proportion equation
   72,907 : 158,990 = 158,990 : x
2. Step 2: Convert to fraction form
   72,907/158,990 = 158,990/x
3. Step 3: Cross multiply
   72,907x = 158,990 × 158,990
4. Step 4: Simplify right side
   72,907x = 25,277,820,100
5. Step 5: Solve for x
   x = 25,277,820,100/72,907
6. Step 6: Final answer
   x = 346,713.21