Finding the Third Proportional to 42,783 and 68,928

Step by Step Solution

1. Step 1: Write the proportion equation
   42,783 : 68,928 = 68,928 : x
2. Step 2: Convert to fraction form
   42,783/68,928 = 68,928/x
3. Step 3: Cross multiply
   42,783x = 68,928 × 68,928
4. Step 4: Simplify right side
   42,783x = 4,751,069,184
5. Step 5: Solve for x
   x = 4,751,069,184/42,783
6. Step 6: Final answer
   x = 111,050.40