Finding the Fourth Proportional to 2,123.24, 3,181.40 and 1,081.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.24 : 3,181.40 = 1,081.82 : x
2. Step 2: Convert to fraction form
   2,123.24/3,181.40 = 1,081.82/x
3. Step 3: Cross multiply
   2,123.24x = 3,181.40 × 1,081.82
4. Step 4: Simplify right side
   2,123.24x = 3,441,702.15
5. Step 5: Solve for x
   x = 3,441,702.15/2,123.24
6. Step 6: Final answer
   x = 1,620.97