Finding the Fourth Proportional to 3,561.72, 4,914.90 and 2,145.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,561.72 : 4,914.90 = 2,145.48 : x
2. Step 2: Convert to fraction form
   3,561.72/4,914.90 = 2,145.48/x
3. Step 3: Cross multiply
   3,561.72x = 4,914.90 × 2,145.48
4. Step 4: Simplify right side
   3,561.72x = 10,544,819.65
5. Step 5: Solve for x
   x = 10,544,819.65/3,561.72
6. Step 6: Final answer
   x = 2,960.60