Finding the Third Proportional to 72,336 and 111,990

Step by Step Solution

1. Step 1: Write the proportion equation
   72,336 : 111,990 = 111,990 : x
2. Step 2: Convert to fraction form
   72,336/111,990 = 111,990/x
3. Step 3: Cross multiply
   72,336x = 111,990 × 111,990
4. Step 4: Simplify right side
   72,336x = 12,541,760,100
5. Step 5: Solve for x
   x = 12,541,760,100/72,336
6. Step 6: Final answer
   x = 173,382.00