Finding the Fourth Proportional to 14,498.72, 21,751.54 and 5,139.56

Step by Step Solution

1. Step 1: Write the proportion equation
   14,498.72 : 21,751.54 = 5,139.56 : x
2. Step 2: Convert to fraction form
   14,498.72/21,751.54 = 5,139.56/x
3. Step 3: Cross multiply
   14,498.72x = 21,751.54 × 5,139.56
4. Step 4: Simplify right side
   14,498.72x = 111,793,344.92
5. Step 5: Solve for x
   x = 111,793,344.92/14,498.72
6. Step 6: Final answer
   x = 7,710.57