Finding the Fourth Proportional to 2,556.12, 3,527.34 and 1,421.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,556.12 : 3,527.34 = 1,421.75 : x
2. Step 2: Convert to fraction form
   2,556.12/3,527.34 = 1,421.75/x
3. Step 3: Cross multiply
   2,556.12x = 3,527.34 × 1,421.75
4. Step 4: Simplify right side
   2,556.12x = 5,014,978.01
5. Step 5: Solve for x
   x = 5,014,978.01/2,556.12
6. Step 6: Final answer
   x = 1,961.95