Finding the Fourth Proportional to 1,563.56, 2,157.72 and 864.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,563.56 : 2,157.72 = 864.94 : x
2. Step 2: Convert to fraction form
   1,563.56/2,157.72 = 864.94/x
3. Step 3: Cross multiply
   1,563.56x = 2,157.72 × 864.94
4. Step 4: Simplify right side
   1,563.56x = 1,866,298.34
5. Step 5: Solve for x
   x = 1,866,298.34/1,563.56
6. Step 6: Final answer
   x = 1,193.62