Finding the Fourth Proportional to 1,871.57, 2,807.72 and 573.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,871.57 : 2,807.72 = 573.23 : x
2. Step 2: Convert to fraction form
   1,871.57/2,807.72 = 573.23/x
3. Step 3: Cross multiply
   1,871.57x = 2,807.72 × 573.23
4. Step 4: Simplify right side
   1,871.57x = 1,609,469.34
5. Step 5: Solve for x
   x = 1,609,469.34/1,871.57
6. Step 6: Final answer
   x = 859.96