Finding the Fourth Proportional to 1,687.39, 2,528.42 and 1,029.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,687.39 : 2,528.42 = 1,029.56 : x
2. Step 2: Convert to fraction form
   1,687.39/2,528.42 = 1,029.56/x
3. Step 3: Cross multiply
   1,687.39x = 2,528.42 × 1,029.56
4. Step 4: Simplify right side
   1,687.39x = 2,603,153.72
5. Step 5: Solve for x
   x = 2,603,153.72/1,687.39
6. Step 6: Final answer
   x = 1,542.71