Finding the Fourth Proportional to 2,106.92, 2,912.88 and 2,015.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,106.92 : 2,912.88 = 2,015.12 : x
2. Step 2: Convert to fraction form
   2,106.92/2,912.88 = 2,015.12/x
3. Step 3: Cross multiply
   2,106.92x = 2,912.88 × 2,015.12
4. Step 4: Simplify right side
   2,106.92x = 5,869,802.75
5. Step 5: Solve for x
   x = 5,869,802.75/2,106.92
6. Step 6: Final answer
   x = 2,785.96