Finding the Third Proportional to 69,978 and 151,620

Step by Step Solution

1. Step 1: Write the proportion equation
   69,978 : 151,620 = 151,620 : x
2. Step 2: Convert to fraction form
   69,978/151,620 = 151,620/x
3. Step 3: Cross multiply
   69,978x = 151,620 × 151,620
4. Step 4: Simplify right side
   69,978x = 22,988,624,400
5. Step 5: Solve for x
   x = 22,988,624,400/69,978
6. Step 6: Final answer
   x = 328,512.17