Finding the Fourth Proportional to 1,144.81, 1,581.15 and 753.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,144.81 : 1,581.15 = 753.58 : x
2. Step 2: Convert to fraction form
   1,144.81/1,581.15 = 753.58/x
3. Step 3: Cross multiply
   1,144.81x = 1,581.15 × 753.58
4. Step 4: Simplify right side
   1,144.81x = 1,191,523.02
5. Step 5: Solve for x
   x = 1,191,523.02/1,144.81
6. Step 6: Final answer
   x = 1,040.80