Finding the Third Proportional to 13,578 and 28,020

Step by Step Solution

1. Step 1: Write the proportion equation
   13,578 : 28,020 = 28,020 : x
2. Step 2: Convert to fraction form
   13,578/28,020 = 28,020/x
3. Step 3: Cross multiply
   13,578x = 28,020 × 28,020
4. Step 4: Simplify right side
   13,578x = 785,120,400
5. Step 5: Solve for x
   x = 785,120,400/13,578
6. Step 6: Final answer
   x = 57,822.98