Finding the Fourth Proportional to 1,563.59, 2,128.83 and 1,558.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.59 : 2,128.83 = 1,558.73 : x
2. Step 2: Convert to fraction form
   1,563.59/2,128.83 = 1,558.73/x
3. Step 3: Cross multiply
   1,563.59x = 2,128.83 × 1,558.73
4. Step 4: Simplify right side
   1,563.59x = 3,318,260.54
5. Step 5: Solve for x
   x = 3,318,260.54/1,563.59
6. Step 6: Final answer
   x = 2,122.21