Finding the Fourth Proportional to 2,123.56, 3,181.02 and 1,393.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,123.56 : 3,181.02 = 1,393.48 : x
2. Step 2: Convert to fraction form
   2,123.56/3,181.02 = 1,393.48/x
3. Step 3: Cross multiply
   2,123.56x = 3,181.02 × 1,393.48
4. Step 4: Simplify right side
   2,123.56x = 4,432,687.75
5. Step 5: Solve for x
   x = 4,432,687.75/2,123.56
6. Step 6: Final answer
   x = 2,087.39