Finding the Fourth Proportional to 3,939.68, 5,888.16 and 3,628.32

Step by Step Solution

1. Step 1: Write the proportion equation
   3,939.68 : 5,888.16 = 3,628.32 : x
2. Step 2: Convert to fraction form
   3,939.68/5,888.16 = 3,628.32/x
3. Step 3: Cross multiply
   3,939.68x = 5,888.16 × 3,628.32
4. Step 4: Simplify right side
   3,939.68x = 21,364,128.69
5. Step 5: Solve for x
   x = 21,364,128.69/3,939.68
6. Step 6: Final answer
   x = 5,422.81