Finding the Fourth Proportional to 3,131.01, 4,684.37 and 2,154.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,131.01 : 4,684.37 = 2,154.15 : x
2. Step 2: Convert to fraction form
   3,131.01/4,684.37 = 2,154.15/x
3. Step 3: Cross multiply
   3,131.01x = 4,684.37 × 2,154.15
4. Step 4: Simplify right side
   3,131.01x = 10,090,824.86
5. Step 5: Solve for x
   x = 10,090,824.86/3,131.01
6. Step 6: Final answer
   x = 3,222.87