Finding the Fourth Proportional to 2,175.52, 3,000.72 and 1,815.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,175.52 : 3,000.72 = 1,815.61 : x
2. Step 2: Convert to fraction form
   2,175.52/3,000.72 = 1,815.61/x
3. Step 3: Cross multiply
   2,175.52x = 3,000.72 × 1,815.61
4. Step 4: Simplify right side
   2,175.52x = 5,448,137.24
5. Step 5: Solve for x
   x = 5,448,137.24/2,175.52
6. Step 6: Final answer
   x = 2,504.29