Finding the Fourth Proportional to 2,267.22, 3,128.70 and 1,272.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,267.22 : 3,128.70 = 1,272.47 : x
2. Step 2: Convert to fraction form
   2,267.22/3,128.70 = 1,272.47/x
3. Step 3: Cross multiply
   2,267.22x = 3,128.70 × 1,272.47
4. Step 4: Simplify right side
   2,267.22x = 3,981,176.89
5. Step 5: Solve for x
   x = 3,981,176.89/2,267.22
6. Step 6: Final answer
   x = 1,755.97