Finding the Fourth Proportional to 1,563.86, 2,157.74 and 958.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.86 : 2,157.74 = 958.03 : x
2. Step 2: Convert to fraction form
   1,563.86/2,157.74 = 958.03/x
3. Step 3: Cross multiply
   1,563.86x = 2,157.74 × 958.03
4. Step 4: Simplify right side
   1,563.86x = 2,067,174.86
5. Step 5: Solve for x
   x = 2,067,174.86/1,563.86
6. Step 6: Final answer
   x = 1,321.85