Finding the Fourth Proportional to 3,711.59, 5,122.08 and 2,118.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,711.59 : 5,122.08 = 2,118.21 : x
2. Step 2: Convert to fraction form
   3,711.59/5,122.08 = 2,118.21/x
3. Step 3: Cross multiply
   3,711.59x = 5,122.08 × 2,118.21
4. Step 4: Simplify right side
   3,711.59x = 10,849,628.27
5. Step 5: Solve for x
   x = 10,849,628.27/3,711.59
6. Step 6: Final answer
   x = 2,923.17