Finding the Fourth Proportional to 2,447.34, 3,671.69 and 986.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,447.34 : 3,671.69 = 986.15 : x
2. Step 2: Convert to fraction form
   2,447.34/3,671.69 = 986.15/x
3. Step 3: Cross multiply
   2,447.34x = 3,671.69 × 986.15
4. Step 4: Simplify right side
   2,447.34x = 3,620,837.09
5. Step 5: Solve for x
   x = 3,620,837.09/2,447.34
6. Step 6: Final answer
   x = 1,479.50