Finding the Fourth Proportional to 2,623.40, 3,619.56 and 1,628.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.40 : 3,619.56 = 1,628.72 : x
2. Step 2: Convert to fraction form
   2,623.40/3,619.56 = 1,628.72/x
3. Step 3: Cross multiply
   2,623.40x = 3,619.56 × 1,628.72
4. Step 4: Simplify right side
   2,623.40x = 5,895,249.76
5. Step 5: Solve for x
   x = 5,895,249.76/2,623.40
6. Step 6: Final answer
   x = 2,247.18