Finding the Fourth Proportional to 2,266.86, 3,128.10 and 1,272.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,266.86 : 3,128.10 = 1,272.29 : x
2. Step 2: Convert to fraction form
   2,266.86/3,128.10 = 1,272.29/x
3. Step 3: Cross multiply
   2,266.86x = 3,128.10 × 1,272.29
4. Step 4: Simplify right side
   2,266.86x = 3,979,834.71
5. Step 5: Solve for x
   x = 3,979,834.71/2,266.86
6. Step 6: Final answer
   x = 1,755.66