Finding the Fourth Proportional to 2,576.32, 3,554.72 and 1,645.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,576.32 : 3,554.72 = 1,645.12 : x
2. Step 2: Convert to fraction form
   2,576.32/3,554.72 = 1,645.12/x
3. Step 3: Cross multiply
   2,576.32x = 3,554.72 × 1,645.12
4. Step 4: Simplify right side
   2,576.32x = 5,847,940.97
5. Step 5: Solve for x
   x = 5,847,940.97/2,576.32
6. Step 6: Final answer
   x = 2,269.88