Finding the Fourth Proportional to 2,209.30, 3,056.37 and 1,815.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.30 : 3,056.37 = 1,815.54 : x
2. Step 2: Convert to fraction form
   2,209.30/3,056.37 = 1,815.54/x
3. Step 3: Cross multiply
   2,209.30x = 3,056.37 × 1,815.54
4. Step 4: Simplify right side
   2,209.30x = 5,548,961.99
5. Step 5: Solve for x
   x = 5,548,961.99/2,209.30
6. Step 6: Final answer
   x = 2,511.64