Finding the Fourth Proportional to 10,930.72, 16,396.06 and 3,139.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.72 : 16,396.06 = 3,139.52 : x
2. Step 2: Convert to fraction form
   10,930.72/16,396.06 = 3,139.52/x
3. Step 3: Cross multiply
   10,930.72x = 16,396.06 × 3,139.52
4. Step 4: Simplify right side
   10,930.72x = 51,475,758.29
5. Step 5: Solve for x
   x = 51,475,758.29/10,930.72
6. Step 6: Final answer
   x = 4,709.27