Finding the Fourth Proportional to 1,716.48, 2,570.88 and 1,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,716.48 : 2,570.88 = 1,390.56 : x
2. Step 2: Convert to fraction form
   1,716.48/2,570.88 = 1,390.56/x
3. Step 3: Cross multiply
   1,716.48x = 2,570.88 × 1,390.56
4. Step 4: Simplify right side
   1,716.48x = 3,574,962.89
5. Step 5: Solve for x
   x = 3,574,962.89/1,716.48
6. Step 6: Final answer
   x = 2,082.73