Finding the Fourth Proportional to 3,558.66, 4,910.71 and 2,142.07

Step by Step Solution

1. Step 1: Write the proportion equation
   3,558.66 : 4,910.71 = 2,142.07 : x
2. Step 2: Convert to fraction form
   3,558.66/4,910.71 = 2,142.07/x
3. Step 3: Cross multiply
   3,558.66x = 4,910.71 × 2,142.07
4. Step 4: Simplify right side
   3,558.66x = 10,519,098.58
5. Step 5: Solve for x
   x = 10,519,098.58/3,558.66
6. Step 6: Final answer
   x = 2,955.91