Finding the Fourth Proportional to 2,123.55, 3,185.25 and 874.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.55 : 3,185.25 = 874.09 : x
2. Step 2: Convert to fraction form
   2,123.55/3,185.25 = 874.09/x
3. Step 3: Cross multiply
   2,123.55x = 3,185.25 × 874.09
4. Step 4: Simplify right side
   2,123.55x = 2,784,195.17
5. Step 5: Solve for x
   x = 2,784,195.17/2,123.55
6. Step 6: Final answer
   x = 1,311.11