Finding the Fourth Proportional to 1,632.37, 2,448.55 and 399.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,632.37 : 2,448.55 = 399.77 : x
2. Step 2: Convert to fraction form
   1,632.37/2,448.55 = 399.77/x
3. Step 3: Cross multiply
   1,632.37x = 2,448.55 × 399.77
4. Step 4: Simplify right side
   1,632.37x = 978,842.59
5. Step 5: Solve for x
   x = 978,842.59/1,632.37
6. Step 6: Final answer
   x = 599.65