Finding the Fourth Proportional to 2,518.57, 3,471.72 and 2,145.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518.57 : 3,471.72 = 2,145.43 : x
2. Step 2: Convert to fraction form
   2,518.57/3,471.72 = 2,145.43/x
3. Step 3: Cross multiply
   2,518.57x = 3,471.72 × 2,145.43
4. Step 4: Simplify right side
   2,518.57x = 7,448,332.24
5. Step 5: Solve for x
   x = 7,448,332.24/2,518.57
6. Step 6: Final answer
   x = 2,957.37