Finding the Fourth Proportional to 1,573.53, 2,171.42 and 874.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,573.53 : 2,171.42 = 874.89 : x
2. Step 2: Convert to fraction form
   1,573.53/2,171.42 = 874.89/x
3. Step 3: Cross multiply
   1,573.53x = 2,171.42 × 874.89
4. Step 4: Simplify right side
   1,573.53x = 1,899,749.27
5. Step 5: Solve for x
   x = 1,899,749.27/1,573.53
6. Step 6: Final answer
   x = 1,207.32