Finding the Fourth Proportional to 2,448.48, 3,674.52 and 987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.48 : 3,674.52 = 987.72 : x
2. Step 2: Convert to fraction form
   2,448.48/3,674.52 = 987.72/x
3. Step 3: Cross multiply
   2,448.48x = 3,674.52 × 987.72
4. Step 4: Simplify right side
   2,448.48x = 3,629,396.89
5. Step 5: Solve for x
   x = 3,629,396.89/2,448.48
6. Step 6: Final answer
   x = 1,482.31