Finding the Fourth Proportional to 2,448.56, 3,669.18 and 986.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.56 : 3,669.18 = 986.91 : x
2. Step 2: Convert to fraction form
   2,448.56/3,669.18 = 986.91/x
3. Step 3: Cross multiply
   2,448.56x = 3,669.18 × 986.91
4. Step 4: Simplify right side
   2,448.56x = 3,621,150.43
5. Step 5: Solve for x
   x = 3,621,150.43/2,448.56
6. Step 6: Final answer
   x = 1,478.89