Finding the Third Proportional to 39,783 and 55,768

Step by Step Solution

1. Step 1: Write the proportion equation
   39,783 : 55,768 = 55,768 : x
2. Step 2: Convert to fraction form
   39,783/55,768 = 55,768/x
3. Step 3: Cross multiply
   39,783x = 55,768 × 55,768
4. Step 4: Simplify right side
   39,783x = 3,110,069,824
5. Step 5: Solve for x
   x = 3,110,069,824/39,783
6. Step 6: Final answer
   x = 78,175.85