Finding the Fourth Proportional to 2,267.12, 3,128.83 and 1,272.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,267.12 : 3,128.83 = 1,272.51 : x
2. Step 2: Convert to fraction form
   2,267.12/3,128.83 = 1,272.51/x
3. Step 3: Cross multiply
   2,267.12x = 3,128.83 × 1,272.51
4. Step 4: Simplify right side
   2,267.12x = 3,981,464.28
5. Step 5: Solve for x
   x = 3,981,464.28/2,267.12
6. Step 6: Final answer
   x = 1,756.18