Finding the Fourth Proportional to 2,523.42, 3,780.36 and 1,428.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,523.42 : 3,780.36 = 1,428.57 : x
2. Step 2: Convert to fraction form
   2,523.42/3,780.36 = 1,428.57/x
3. Step 3: Cross multiply
   2,523.42x = 3,780.36 × 1,428.57
4. Step 4: Simplify right side
   2,523.42x = 5,400,508.89
5. Step 5: Solve for x
   x = 5,400,508.89/2,523.42
6. Step 6: Final answer
   x = 2,140.15