Finding the Third Proportional to 158,644 and 242,990

Step by Step Solution

1. Step 1: Write the proportion equation
   158,644 : 242,990 = 242,990 : x
2. Step 2: Convert to fraction form
   158,644/242,990 = 242,990/x
3. Step 3: Cross multiply
   158,644x = 242,990 × 242,990
4. Step 4: Simplify right side
   158,644x = 59,044,140,100
5. Step 5: Solve for x
   x = 59,044,140,100/158,644
6. Step 6: Final answer
   x = 372,180.10