Finding the Fourth Proportional to 2,123.09, 3,181.23 and 1,427.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.09 : 3,181.23 = 1,427.20 : x
2. Step 2: Convert to fraction form
   2,123.09/3,181.23 = 1,427.20/x
3. Step 3: Cross multiply
   2,123.09x = 3,181.23 × 1,427.20
4. Step 4: Simplify right side
   2,123.09x = 4,540,251.46
5. Step 5: Solve for x
   x = 4,540,251.46/2,123.09
6. Step 6: Final answer
   x = 2,138.51