Finding the Fourth Proportional to 2,562.57, 3,536.40 and 1,428.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,562.57 : 3,536.40 = 1,428.31 : x
2. Step 2: Convert to fraction form
   2,562.57/3,536.40 = 1,428.31/x
3. Step 3: Cross multiply
   2,562.57x = 3,536.40 × 1,428.31
4. Step 4: Simplify right side
   2,562.57x = 5,051,075.48
5. Step 5: Solve for x
   x = 5,051,075.48/2,562.57
6. Step 6: Final answer
   x = 1,971.10