Finding the Fourth Proportional to 3,315.39, 4,971.86 and 974.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,315.39 : 4,971.86 = 974.79 : x
2. Step 2: Convert to fraction form
   3,315.39/4,971.86 = 974.79/x
3. Step 3: Cross multiply
   3,315.39x = 4,971.86 × 974.79
4. Step 4: Simplify right side
   3,315.39x = 4,846,519.41
5. Step 5: Solve for x
   x = 4,846,519.41/3,315.39
6. Step 6: Final answer
   x = 1,461.82