Finding the Fourth Proportional to 2,447.98, 3,672.12 and 987.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.98 : 3,672.12 = 987.13 : x
2. Step 2: Convert to fraction form
   2,447.98/3,672.12 = 987.13/x
3. Step 3: Cross multiply
   2,447.98x = 3,672.12 × 987.13
4. Step 4: Simplify right side
   2,447.98x = 3,624,859.82
5. Step 5: Solve for x
   x = 3,624,859.82/2,447.98
6. Step 6: Final answer
   x = 1,480.76