Finding the Fourth Proportional to 1,075.98, 1,485.36 and 840.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075.98 : 1,485.36 = 840.27 : x
2. Step 2: Convert to fraction form
   1,075.98/1,485.36 = 840.27/x
3. Step 3: Cross multiply
   1,075.98x = 1,485.36 × 840.27
4. Step 4: Simplify right side
   1,075.98x = 1,248,103.45
5. Step 5: Solve for x
   x = 1,248,103.45/1,075.98
6. Step 6: Final answer
   x = 1,159.97