Finding the Fourth Proportional to 2,448.21, 3,669.24 and 986.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.21 : 3,669.24 = 986.55 : x
2. Step 2: Convert to fraction form
   2,448.21/3,669.24 = 986.55/x
3. Step 3: Cross multiply
   2,448.21x = 3,669.24 × 986.55
4. Step 4: Simplify right side
   2,448.21x = 3,619,888.72
5. Step 5: Solve for x
   x = 3,619,888.72/2,448.21
6. Step 6: Final answer
   x = 1,478.59