Finding the Fourth Proportional to 1,145.55, 1,581.63 and 753.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.55 : 1,581.63 = 753.24 : x
2. Step 2: Convert to fraction form
   1,145.55/1,581.63 = 753.24/x
3. Step 3: Cross multiply
   1,145.55x = 1,581.63 × 753.24
4. Step 4: Simplify right side
   1,145.55x = 1,191,346.98
5. Step 5: Solve for x
   x = 1,191,346.98/1,145.55
6. Step 6: Final answer
   x = 1,039.98