Finding the Fourth Proportional to 2,388.89, 3,581.55 and 1,722.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,388.89 : 3,581.55 = 1,722.13 : x
2. Step 2: Convert to fraction form
   2,388.89/3,581.55 = 1,722.13/x
3. Step 3: Cross multiply
   2,388.89x = 3,581.55 × 1,722.13
4. Step 4: Simplify right side
   2,388.89x = 6,167,885.75
5. Step 5: Solve for x
   x = 6,167,885.75/2,388.89
6. Step 6: Final answer
   x = 2,581.90