Finding the Fourth Proportional to 10,929.72, 16,394.56 and 3,138.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,929.72 : 16,394.56 = 3,138.52 : x
2. Step 2: Convert to fraction form
   10,929.72/16,394.56 = 3,138.52/x
3. Step 3: Cross multiply
   10,929.72x = 16,394.56 × 3,138.52
4. Step 4: Simplify right side
   10,929.72x = 51,454,654.45
5. Step 5: Solve for x
   x = 51,454,654.45/10,929.72
6. Step 6: Final answer
   x = 4,707.77