Finding the Fourth Proportional to 10,977.20, 16,461.69 and 3,479.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,977.20 : 16,461.69 = 3,479.89 : x
2. Step 2: Convert to fraction form
   10,977.20/16,461.69 = 3,479.89/x
3. Step 3: Cross multiply
   10,977.20x = 16,461.69 × 3,479.89
4. Step 4: Simplify right side
   10,977.20x = 57,284,870.41
5. Step 5: Solve for x
   x = 57,284,870.41/10,977.20
6. Step 6: Final answer
   x = 5,218.53