Finding the Fourth Proportional to 2,557.10, 3,528.96 and 1,422.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,557.10 : 3,528.96 = 1,422.84 : x
2. Step 2: Convert to fraction form
   2,557.10/3,528.96 = 1,422.84/x
3. Step 3: Cross multiply
   2,557.10x = 3,528.96 × 1,422.84
4. Step 4: Simplify right side
   2,557.10x = 5,021,145.45
5. Step 5: Solve for x
   x = 5,021,145.45/2,557.10
6. Step 6: Final answer
   x = 1,963.61