Finding the Fourth Proportional to 2,221.29, 3,065.28 and 1,276.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.29 : 3,065.28 = 1,276.42 : x
2. Step 2: Convert to fraction form
   2,221.29/3,065.28 = 1,276.42/x
3. Step 3: Cross multiply
   2,221.29x = 3,065.28 × 1,276.42
4. Step 4: Simplify right side
   2,221.29x = 3,912,584.70
5. Step 5: Solve for x
   x = 3,912,584.70/2,221.29
6. Step 6: Final answer
   x = 1,761.40