Finding the Fourth Proportional to 2,221.61, 3,065.81 and 1,226.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.61 : 3,065.81 = 1,226.88 : x
2. Step 2: Convert to fraction form
   2,221.61/3,065.81 = 1,226.88/x
3. Step 3: Cross multiply
   2,221.61x = 3,065.81 × 1,226.88
4. Step 4: Simplify right side
   2,221.61x = 3,761,386.34
5. Step 5: Solve for x
   x = 3,761,386.34/2,221.61
6. Step 6: Final answer
   x = 1,693.09