Finding the Third Proportional to 30,548 and 68,978

Step by Step Solution

1. Step 1: Write the proportion equation
   30,548 : 68,978 = 68,978 : x
2. Step 2: Convert to fraction form
   30,548/68,978 = 68,978/x
3. Step 3: Cross multiply
   30,548x = 68,978 × 68,978
4. Step 4: Simplify right side
   30,548x = 4,757,964,484
5. Step 5: Solve for x
   x = 4,757,964,484/30,548
6. Step 6: Final answer
   x = 155,753.71