Finding the Fourth Proportional to 1,563.98, 2,158.22 and 900.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.98 : 2,158.22 = 900.93 : x
2. Step 2: Convert to fraction form
   1,563.98/2,158.22 = 900.93/x
3. Step 3: Cross multiply
   1,563.98x = 2,158.22 × 900.93
4. Step 4: Simplify right side
   1,563.98x = 1,944,392.10
5. Step 5: Solve for x
   x = 1,944,392.10/1,563.98
6. Step 6: Final answer
   x = 1,243.24