Finding the Third Proportional to 46,990 and 72,768

Step by Step Solution

1. Step 1: Write the proportion equation
   46,990 : 72,768 = 72,768 : x
2. Step 2: Convert to fraction form
   46,990/72,768 = 72,768/x
3. Step 3: Cross multiply
   46,990x = 72,768 × 72,768
4. Step 4: Simplify right side
   46,990x = 5,295,181,824
5. Step 5: Solve for x
   x = 5,295,181,824/46,990
6. Step 6: Final answer
   x = 112,687.42