Finding the Fourth Proportional to 3,612.15, 4,984.74 and 2,120.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,612.15 : 4,984.74 = 2,120.10 : x
2. Step 2: Convert to fraction form
   3,612.15/4,984.74 = 2,120.10/x
3. Step 3: Cross multiply
   3,612.15x = 4,984.74 × 2,120.10
4. Step 4: Simplify right side
   3,612.15x = 10,568,147.27
5. Step 5: Solve for x
   x = 10,568,147.27/3,612.15
6. Step 6: Final answer
   x = 2,925.72