Finding the Fourth Proportional to 2,448.35, 3,673.20 and 987.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,448.35 : 3,673.20 = 987.15 : x
2. Step 2: Convert to fraction form
   2,448.35/3,673.20 = 987.15/x
3. Step 3: Cross multiply
   2,448.35x = 3,673.20 × 987.15
4. Step 4: Simplify right side
   2,448.35x = 3,625,999.38
5. Step 5: Solve for x
   x = 3,625,999.38/2,448.35
6. Step 6: Final answer
   x = 1,481.00