Finding the Fourth Proportional to 1,716.24, 2,574.72 and 561.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,716.24 : 2,574.72 = 561.72 : x
2. Step 2: Convert to fraction form
   1,716.24/2,574.72 = 561.72/x
3. Step 3: Cross multiply
   1,716.24x = 2,574.72 × 561.72
4. Step 4: Simplify right side
   1,716.24x = 1,446,271.72
5. Step 5: Solve for x
   x = 1,446,271.72/1,716.24
6. Step 6: Final answer
   x = 842.70