Finding the Fourth Proportional to 1,075.89, 1,485.15 and 677.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.89 : 1,485.15 = 677.58 : x
2. Step 2: Convert to fraction form
   1,075.89/1,485.15 = 677.58/x
3. Step 3: Cross multiply
   1,075.89x = 1,485.15 × 677.58
4. Step 4: Simplify right side
   1,075.89x = 1,006,307.94
5. Step 5: Solve for x
   x = 1,006,307.94/1,075.89
6. Step 6: Final answer
   x = 935.33