Finding the Fourth Proportional to 2,123.40, 3,181.82 and 890.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.40 : 3,181.82 = 890.52 : x
2. Step 2: Convert to fraction form
   2,123.40/3,181.82 = 890.52/x
3. Step 3: Cross multiply
   2,123.40x = 3,181.82 × 890.52
4. Step 4: Simplify right side
   2,123.40x = 2,833,474.35
5. Step 5: Solve for x
   x = 2,833,474.35/2,123.40
6. Step 6: Final answer
   x = 1,334.40