Finding the Fourth Proportional to 2,387.79, 3,580.83 and 827.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,387.79 : 3,580.83 = 827.37 : x
2. Step 2: Convert to fraction form
   2,387.79/3,580.83 = 827.37/x
3. Step 3: Cross multiply
   2,387.79x = 3,580.83 × 827.37
4. Step 4: Simplify right side
   2,387.79x = 2,962,678.20
5. Step 5: Solve for x
   x = 2,962,678.20/2,387.79
6. Step 6: Final answer
   x = 1,240.76