Finding the Fourth Proportional to 2,221.72, 3,065.88 and 1,226.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.72 : 3,065.88 = 1,226.96 : x
2. Step 2: Convert to fraction form
   2,221.72/3,065.88 = 1,226.96/x
3. Step 3: Cross multiply
   2,221.72x = 3,065.88 × 1,226.96
4. Step 4: Simplify right side
   2,221.72x = 3,761,712.12
5. Step 5: Solve for x
   x = 3,761,712.12/2,221.72
6. Step 6: Final answer
   x = 1,693.15