Finding the Fourth Proportional to 3,684.89, 5,085.15 and 2,112.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,684.89 : 5,085.15 = 2,112.98 : x
2. Step 2: Convert to fraction form
   3,684.89/5,085.15 = 2,112.98/x
3. Step 3: Cross multiply
   3,684.89x = 5,085.15 × 2,112.98
4. Step 4: Simplify right side
   3,684.89x = 10,744,820.25
5. Step 5: Solve for x
   x = 10,744,820.25/3,684.89
6. Step 6: Final answer
   x = 2,915.91