Finding the Third Proportional to 3,915.75 and 8,865.38

Step by Step Solution

1. Step 1: Write the proportion equation
   3,915.75 : 8,865.38 = 8,865.38 : x
2. Step 2: Convert to fraction form
   3,915.75/8,865.38 = 8,865.38/x
3. Step 3: Cross multiply
   3,915.75x = 8,865.38 × 8,865.38
4. Step 4: Simplify right side
   3,915.75x = 78,594,873.89
5. Step 5: Solve for x
   x = 78,594,873.89/3,915.75
6. Step 6: Final answer
   x = 20,071.47