Finding the Fourth Proportional to 2,387.77, 3,581.61 and 744.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.77 : 3,581.61 = 744.31 : x
2. Step 2: Convert to fraction form
   2,387.77/3,581.61 = 744.31/x
3. Step 3: Cross multiply
   2,387.77x = 3,581.61 × 744.31
4. Step 4: Simplify right side
   2,387.77x = 2,665,828.14
5. Step 5: Solve for x
   x = 2,665,828.14/2,387.77
6. Step 6: Final answer
   x = 1,116.45