Finding the Fourth Proportional to 1,608.72, 2,221.46 and 1,556.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,608.72 : 2,221.46 = 1,556.43 : x
2. Step 2: Convert to fraction form
   1,608.72/2,221.46 = 1,556.43/x
3. Step 3: Cross multiply
   1,608.72x = 2,221.46 × 1,556.43
4. Step 4: Simplify right side
   1,608.72x = 3,457,539.21
5. Step 5: Solve for x
   x = 3,457,539.21/1,608.72
6. Step 6: Final answer
   x = 2,149.25