Finding the Fourth Proportional to 2,266.76, 3,128.46 and 1,272.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,266.76 : 3,128.46 = 1,272.16 : x
2. Step 2: Convert to fraction form
   2,266.76/3,128.46 = 1,272.16/x
3. Step 3: Cross multiply
   2,266.76x = 3,128.46 × 1,272.16
4. Step 4: Simplify right side
   2,266.76x = 3,979,901.67
5. Step 5: Solve for x
   x = 3,979,901.67/2,266.76
6. Step 6: Final answer
   x = 1,755.77