Finding the Fourth Proportional to 2,387.72, 3,581.86 and 1,090.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.72 : 3,581.86 = 1,090.04 : x
2. Step 2: Convert to fraction form
   2,387.72/3,581.86 = 1,090.04/x
3. Step 3: Cross multiply
   2,387.72x = 3,581.86 × 1,090.04
4. Step 4: Simplify right side
   2,387.72x = 3,904,370.67
5. Step 5: Solve for x
   x = 3,904,370.67/2,387.72
6. Step 6: Final answer
   x = 1,635.19