Finding the Fourth Proportional to 2,387.81, 3,581.10 and 744.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.81 : 3,581.10 = 744.05 : x
2. Step 2: Convert to fraction form
   2,387.81/3,581.10 = 744.05/x
3. Step 3: Cross multiply
   2,387.81x = 3,581.10 × 744.05
4. Step 4: Simplify right side
   2,387.81x = 2,664,499.55
5. Step 5: Solve for x
   x = 2,664,499.55/2,387.81
6. Step 6: Final answer
   x = 1,115.88