Finding the Fourth Proportional to 2,556.78, 3,528.22 and 1,437.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.78 : 3,528.22 = 1,437.76 : x
2. Step 2: Convert to fraction form
   2,556.78/3,528.22 = 1,437.76/x
3. Step 3: Cross multiply
   2,556.78x = 3,528.22 × 1,437.76
4. Step 4: Simplify right side
   2,556.78x = 5,072,733.59
5. Step 5: Solve for x
   x = 5,072,733.59/2,556.78
6. Step 6: Final answer
   x = 1,984.03