Finding the Fourth Proportional to 2,221.49, 3,065.56 and 1,226.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.49 : 3,065.56 = 1,226.72 : x
2. Step 2: Convert to fraction form
   2,221.49/3,065.56 = 1,226.72/x
3. Step 3: Cross multiply
   2,221.49x = 3,065.56 × 1,226.72
4. Step 4: Simplify right side
   2,221.49x = 3,760,588.36
5. Step 5: Solve for x
   x = 3,760,588.36/2,221.49
6. Step 6: Final answer
   x = 1,692.82