Finding the Fourth Proportional to 2,469.42, 3,407.85 and 1,421.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,469.42 : 3,407.85 = 1,421.55 : x
2. Step 2: Convert to fraction form
   2,469.42/3,407.85 = 1,421.55/x
3. Step 3: Cross multiply
   2,469.42x = 3,407.85 × 1,421.55
4. Step 4: Simplify right side
   2,469.42x = 4,844,429.17
5. Step 5: Solve for x
   x = 4,844,429.17/2,469.42
6. Step 6: Final answer
   x = 1,961.77