Finding the Fourth Proportional to 3,684.39, 5,084.69 and 2,112.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,684.39 : 5,084.69 = 2,112.72 : x
2. Step 2: Convert to fraction form
   3,684.39/5,084.69 = 2,112.72/x
3. Step 3: Cross multiply
   3,684.39x = 5,084.69 × 2,112.72
4. Step 4: Simplify right side
   3,684.39x = 10,742,515.69
5. Step 5: Solve for x
   x = 10,742,515.69/3,684.39
6. Step 6: Final answer
   x = 2,915.68