Finding the Third Proportional to 1,581.87 and 2,172.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.87 : 2,172.05 = 2,172.05 : x
2. Step 2: Convert to fraction form
   1,581.87/2,172.05 = 2,172.05/x
3. Step 3: Cross multiply
   1,581.87x = 2,172.05 × 2,172.05
4. Step 4: Simplify right side
   1,581.87x = 4,717,800.35
5. Step 5: Solve for x
   x = 4,717,800.35/1,581.87
6. Step 6: Final answer
   x = 2,982.41