Finding the Third Proportional to 2,572.75 and 3,878

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.75 : 3,878 = 3,878 : x
2. Step 2: Convert to fraction form
   2,572.75/3,878 = 3,878/x
3. Step 3: Cross multiply
   2,572.75x = 3,878 × 3,878
4. Step 4: Simplify right side
   2,572.75x = 15,038,884
5. Step 5: Solve for x
   x = 15,038,884/2,572.75
6. Step 6: Final answer
   x = 5,845.45