Finding the Fourth Proportional to 1,526.78, 2,105.09 and 1,028.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,526.78 : 2,105.09 = 1,028.55 : x
2. Step 2: Convert to fraction form
   1,526.78/2,105.09 = 1,028.55/x
3. Step 3: Cross multiply
   1,526.78x = 2,105.09 × 1,028.55
4. Step 4: Simplify right side
   1,526.78x = 2,165,185.18
5. Step 5: Solve for x
   x = 2,165,185.18/1,526.78
6. Step 6: Final answer
   x = 1,418.14