Finding the Fourth Proportional to 1,563.39, 2,158.02 and 900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.39 : 2,158.02 = 900.50 : x
2. Step 2: Convert to fraction form
   1,563.39/2,158.02 = 900.50/x
3. Step 3: Cross multiply
   1,563.39x = 2,158.02 × 900.50
4. Step 4: Simplify right side
   1,563.39x = 1,943,297.59
5. Step 5: Solve for x
   x = 1,943,297.59/1,563.39
6. Step 6: Final answer
   x = 1,243.01