Finding the Third Proportional to 72,990 and 155,392

Step by Step Solution

1. Step 1: Write the proportion equation
   72,990 : 155,392 = 155,392 : x
2. Step 2: Convert to fraction form
   72,990/155,392 = 155,392/x
3. Step 3: Cross multiply
   72,990x = 155,392 × 155,392
4. Step 4: Simplify right side
   72,990x = 24,146,673,664
5. Step 5: Solve for x
   x = 24,146,673,664/72,990
6. Step 6: Final answer
   x = 330,821.67