Finding the Fourth Proportional to 1,718.89, 2,578.86 and 1,425.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.89 : 2,578.86 = 1,425.06 : x
2. Step 2: Convert to fraction form
   1,718.89/2,578.86 = 1,425.06/x
3. Step 3: Cross multiply
   1,718.89x = 2,578.86 × 1,425.06
4. Step 4: Simplify right side
   1,718.89x = 3,675,030.23
5. Step 5: Solve for x
   x = 3,675,030.23/1,718.89
6. Step 6: Final answer
   x = 2,138.03