Finding the Fourth Proportional to 2,469.88, 3,407.98 and 1,421.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,469.88 : 3,407.98 = 1,421.56 : x
2. Step 2: Convert to fraction form
   2,469.88/3,407.98 = 1,421.56/x
3. Step 3: Cross multiply
   2,469.88x = 3,407.98 × 1,421.56
4. Step 4: Simplify right side
   2,469.88x = 4,844,648.05
5. Step 5: Solve for x
   x = 4,844,648.05/2,469.88
6. Step 6: Final answer
   x = 1,961.49