Finding the Fourth Proportional to 13,929.74, 20,896.72 and 5,047.16

Step by Step Solution

1. Step 1: Write the proportion equation
   13,929.74 : 20,896.72 = 5,047.16 : x
2. Step 2: Convert to fraction form
   13,929.74/20,896.72 = 5,047.16/x
3. Step 3: Cross multiply
   13,929.74x = 20,896.72 × 5,047.16
4. Step 4: Simplify right side
   13,929.74x = 105,469,089.32
5. Step 5: Solve for x
   x = 105,469,089.32/13,929.74
6. Step 6: Final answer
   x = 7,571.50