Finding the Fourth Proportional to 2,221.78, 3,065.91 and 1,227.00

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.78 : 3,065.91 = 1,227.00 : x
2. Step 2: Convert to fraction form
   2,221.78/3,065.91 = 1,227.00/x
3. Step 3: Cross multiply
   2,221.78x = 3,065.91 × 1,227.00
4. Step 4: Simplify right side
   2,221.78x = 3,761,853.17
5. Step 5: Solve for x
   x = 3,761,853.17/2,221.78
6. Step 6: Final answer
   x = 1,693.17