Finding the Fourth Proportional to 3,939.72, 5,888.05 and 3,628.36

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.72 : 5,888.05 = 3,628.36 : x
2. Step 2: Convert to fraction form
   3,939.72/5,888.05 = 3,628.36/x
3. Step 3: Cross multiply
   3,939.72x = 5,888.05 × 3,628.36
4. Step 4: Simplify right side
   3,939.72x = 21,363,965.10
5. Step 5: Solve for x
   x = 21,363,965.10/3,939.72
6. Step 6: Final answer
   x = 5,422.71