Finding the Fourth Proportional to 1,131.14, 1,558.28 and 1,075.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.14 : 1,558.28 = 1,075.55 : x
2. Step 2: Convert to fraction form
   1,131.14/1,558.28 = 1,075.55/x
3. Step 3: Cross multiply
   1,131.14x = 1,558.28 × 1,075.55
4. Step 4: Simplify right side
   1,131.14x = 1,675,994.88
5. Step 5: Solve for x
   x = 1,675,994.88/1,131.14
6. Step 6: Final answer
   x = 1,481.69