Finding the Fourth Proportional to 2,109.16, 2,906.96 and 1,813.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.16 : 2,906.96 = 1,813.24 : x
2. Step 2: Convert to fraction form
   2,109.16/2,906.96 = 1,813.24/x
3. Step 3: Cross multiply
   2,109.16x = 2,906.96 × 1,813.24
4. Step 4: Simplify right side
   2,109.16x = 5,271,016.15
5. Step 5: Solve for x
   x = 5,271,016.15/2,109.16
6. Step 6: Final answer
   x = 2,499.11