Finding the Fourth Proportional to 2,017.05, 2,784.21 and 1,272.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,017.05 : 2,784.21 = 1,272.25 : x
2. Step 2: Convert to fraction form
   2,017.05/2,784.21 = 1,272.25/x
3. Step 3: Cross multiply
   2,017.05x = 2,784.21 × 1,272.25
4. Step 4: Simplify right side
   2,017.05x = 3,542,211.17
5. Step 5: Solve for x
   x = 3,542,211.17/2,017.05
6. Step 6: Final answer
   x = 1,756.13