Finding the Fourth Proportional to 2,221.47, 3,062.76 and 1,821.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,221.47 : 3,062.76 = 1,821.68 : x
2. Step 2: Convert to fraction form
   2,221.47/3,062.76 = 1,821.68/x
3. Step 3: Cross multiply
   2,221.47x = 3,062.76 × 1,821.68
4. Step 4: Simplify right side
   2,221.47x = 5,579,353.32
5. Step 5: Solve for x
   x = 5,579,353.32/2,221.47
6. Step 6: Final answer
   x = 2,511.56