Finding the Fourth Proportional to 3,580.30, 4,940.69 and 2,087.99

Step by Step Solution

1. Step 1: Write the proportion equation
   3,580.30 : 4,940.69 = 2,087.99 : x
2. Step 2: Convert to fraction form
   3,580.30/4,940.69 = 2,087.99/x
3. Step 3: Cross multiply
   3,580.30x = 4,940.69 × 2,087.99
4. Step 4: Simplify right side
   3,580.30x = 10,316,111.31
5. Step 5: Solve for x
   x = 10,316,111.31/3,580.30
6. Step 6: Final answer
   x = 2,881.35