Finding the Fourth Proportional to 2,267.85, 3,128.72 and 1,427.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,267.85 : 3,128.72 = 1,427.07 : x
2. Step 2: Convert to fraction form
   2,267.85/3,128.72 = 1,427.07/x
3. Step 3: Cross multiply
   2,267.85x = 3,128.72 × 1,427.07
4. Step 4: Simplify right side
   2,267.85x = 4,464,895.32
5. Step 5: Solve for x
   x = 4,464,895.32/2,267.85
6. Step 6: Final answer
   x = 1,968.78