Finding the Fourth Proportional to 3,628.54, 5,430.42 and 2,518.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,628.54 : 5,430.42 = 2,518.30 : x
2. Step 2: Convert to fraction form
   3,628.54/5,430.42 = 2,518.30/x
3. Step 3: Cross multiply
   3,628.54x = 5,430.42 × 2,518.30
4. Step 4: Simplify right side
   3,628.54x = 13,675,426.69
5. Step 5: Solve for x
   x = 13,675,426.69/3,628.54
6. Step 6: Final answer
   x = 3,768.85