Finding the Fourth Proportional to 2,351.45, 3,243.57 and 1,554.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,351.45 : 3,243.57 = 1,554.78 : x
2. Step 2: Convert to fraction form
   2,351.45/3,243.57 = 1,554.78/x
3. Step 3: Cross multiply
   2,351.45x = 3,243.57 × 1,554.78
4. Step 4: Simplify right side
   2,351.45x = 5,043,037.76
5. Step 5: Solve for x
   x = 5,043,037.76/2,351.45
6. Step 6: Final answer
   x = 2,144.65