Finding the Fourth Proportional to 1,563.18, 2,157.15 and 900.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.18 : 2,157.15 = 900.01 : x
2. Step 2: Convert to fraction form
   1,563.18/2,157.15 = 900.01/x
3. Step 3: Cross multiply
   1,563.18x = 2,157.15 × 900.01
4. Step 4: Simplify right side
   1,563.18x = 1,941,456.57
5. Step 5: Solve for x
   x = 1,941,456.57/1,563.18
6. Step 6: Final answer
   x = 1,241.99