Finding the Fourth Proportional to 2,172.84, 3,260.16 and 1,017.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,172.84 : 3,260.16 = 1,017.72 : x
2. Step 2: Convert to fraction form
   2,172.84/3,260.16 = 1,017.72/x
3. Step 3: Cross multiply
   2,172.84x = 3,260.16 × 1,017.72
4. Step 4: Simplify right side
   2,172.84x = 3,317,930.04
5. Step 5: Solve for x
   x = 3,317,930.04/2,172.84
6. Step 6: Final answer
   x = 1,527.00