Finding the Fourth Proportional to 2,099.28, 2,910.16 and 2,017.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.28 : 2,910.16 = 2,017.20 : x
2. Step 2: Convert to fraction form
   2,099.28/2,910.16 = 2,017.20/x
3. Step 3: Cross multiply
   2,099.28x = 2,910.16 × 2,017.20
4. Step 4: Simplify right side
   2,099.28x = 5,870,374.75
5. Step 5: Solve for x
   x = 5,870,374.75/2,099.28
6. Step 6: Final answer
   x = 2,796.38