Finding the Fourth Proportional to 1,722.06, 2,585.72 and 1,518.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.06 : 2,585.72 = 1,518.35 : x
2. Step 2: Convert to fraction form
   1,722.06/2,585.72 = 1,518.35/x
3. Step 3: Cross multiply
   1,722.06x = 2,585.72 × 1,518.35
4. Step 4: Simplify right side
   1,722.06x = 3,926,018.83
5. Step 5: Solve for x
   x = 3,926,018.83/1,722.06
6. Step 6: Final answer
   x = 2,279.84