Finding the Third Proportional to 19,578 and 28,056

Step by Step Solution

1. Step 1: Write the proportion equation
   19,578 : 28,056 = 28,056 : x
2. Step 2: Convert to fraction form
   19,578/28,056 = 28,056/x
3. Step 3: Cross multiply
   19,578x = 28,056 × 28,056
4. Step 4: Simplify right side
   19,578x = 787,139,136
5. Step 5: Solve for x
   x = 787,139,136/19,578
6. Step 6: Final answer
   x = 40,205.29