Finding the Fourth Proportional to 2,600.48, 3,588.60 and 1,421.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,600.48 : 3,588.60 = 1,421.56 : x
2. Step 2: Convert to fraction form
   2,600.48/3,588.60 = 1,421.56/x
3. Step 3: Cross multiply
   2,600.48x = 3,588.60 × 1,421.56
4. Step 4: Simplify right side
   2,600.48x = 5,101,392.27
5. Step 5: Solve for x
   x = 5,101,392.27/2,600.48
6. Step 6: Final answer
   x = 1,961.72