Finding the Fourth Proportional to 2,448.54, 3,672.24 and 987.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.54 : 3,672.24 = 987.30 : x
2. Step 2: Convert to fraction form
   2,448.54/3,672.24 = 987.30/x
3. Step 3: Cross multiply
   2,448.54x = 3,672.24 × 987.30
4. Step 4: Simplify right side
   2,448.54x = 3,625,602.55
5. Step 5: Solve for x
   x = 3,625,602.55/2,448.54
6. Step 6: Final answer
   x = 1,480.72