Finding the Fourth Proportional to 2,231.35, 3,078.51 and 1,445.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,231.35 : 3,078.51 = 1,445.55 : x
2. Step 2: Convert to fraction form
   2,231.35/3,078.51 = 1,445.55/x
3. Step 3: Cross multiply
   2,231.35x = 3,078.51 × 1,445.55
4. Step 4: Simplify right side
   2,231.35x = 4,450,123.17
5. Step 5: Solve for x
   x = 4,450,123.17/2,231.35
6. Step 6: Final answer
   x = 1,994.37