Finding the Fourth Proportional to 1,576.81, 2,173.72 and 1,103.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,576.81 : 2,173.72 = 1,103.23 : x
2. Step 2: Convert to fraction form
   1,576.81/2,173.72 = 1,103.23/x
3. Step 3: Cross multiply
   1,576.81x = 2,173.72 × 1,103.23
4. Step 4: Simplify right side
   1,576.81x = 2,398,118.15
5. Step 5: Solve for x
   x = 2,398,118.15/1,576.81
6. Step 6: Final answer
   x = 1,520.87