Finding the Fourth Proportional to 1,722.72, 2,371.53 and 1,556.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.72 : 2,371.53 = 1,556.42 : x
2. Step 2: Convert to fraction form
   1,722.72/2,371.53 = 1,556.42/x
3. Step 3: Cross multiply
   1,722.72x = 2,371.53 × 1,556.42
4. Step 4: Simplify right side
   1,722.72x = 3,691,081.95
5. Step 5: Solve for x
   x = 3,691,081.95/1,722.72
6. Step 6: Final answer
   x = 2,142.59