Finding the Fourth Proportional to 13,011.72, 19,514.34 and 5,216.28

Step by Step Solution

1. Step 1: Write the proportion equation
   13,011.72 : 19,514.34 = 5,216.28 : x
2. Step 2: Convert to fraction form
   13,011.72/19,514.34 = 5,216.28/x
3. Step 3: Cross multiply
   13,011.72x = 19,514.34 × 5,216.28
4. Step 4: Simplify right side
   13,011.72x = 101,792,261.46
5. Step 5: Solve for x
   x = 101,792,261.46/13,011.72
6. Step 6: Final answer
   x = 7,823.12