Finding the Fourth Proportional to 2,448.41, 3,672.77 and 987.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.41 : 3,672.77 = 987.57 : x
2. Step 2: Convert to fraction form
   2,448.41/3,672.77 = 987.57/x
3. Step 3: Cross multiply
   2,448.41x = 3,672.77 × 987.57
4. Step 4: Simplify right side
   2,448.41x = 3,627,112.53
5. Step 5: Solve for x
   x = 3,627,112.53/2,448.41
6. Step 6: Final answer
   x = 1,481.42