Finding the Fourth Proportional to 14,498.48, 21,751.17 and 5,139.31

Step by Step Solution

1. Step 1: Write the proportion equation
   14,498.48 : 21,751.17 = 5,139.31 : x
2. Step 2: Convert to fraction form
   14,498.48/21,751.17 = 5,139.31/x
3. Step 3: Cross multiply
   14,498.48x = 21,751.17 × 5,139.31
4. Step 4: Simplify right side
   14,498.48x = 111,786,005.49
5. Step 5: Solve for x
   x = 111,786,005.49/14,498.48
6. Step 6: Final answer
   x = 7,710.19