Finding the Third Proportional to 2,638.50 and 3,711

Step by Step Solution

1. Step 1: Write the proportion equation
   2,638.50 : 3,711 = 3,711 : x
2. Step 2: Convert to fraction form
   2,638.50/3,711 = 3,711/x
3. Step 3: Cross multiply
   2,638.50x = 3,711 × 3,711
4. Step 4: Simplify right side
   2,638.50x = 13,771,521
5. Step 5: Solve for x
   x = 13,771,521/2,638.50
6. Step 6: Final answer
   x = 5,219.45