Finding the Fourth Proportional to 2,215.10, 3,054.00 and 1,815.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,215.10 : 3,054.00 = 1,815.29 : x
2. Step 2: Convert to fraction form
   2,215.10/3,054.00 = 1,815.29/x
3. Step 3: Cross multiply
   2,215.10x = 3,054.00 × 1,815.29
4. Step 4: Simplify right side
   2,215.10x = 5,543,915.83
5. Step 5: Solve for x
   x = 5,543,915.83/2,215.10
6. Step 6: Final answer
   x = 2,502.79