Finding the Fourth Proportional to 20,575.98, 30,865.59 and 7,429.68

Step by Step Solution

1. Step 1: Write the proportion equation
   20,575.98 : 30,865.59 = 7,429.68 : x
2. Step 2: Convert to fraction form
   20,575.98/30,865.59 = 7,429.68/x
3. Step 3: Cross multiply
   20,575.98x = 30,865.59 × 7,429.68
4. Step 4: Simplify right side
   20,575.98x = 229,321,456.71
5. Step 5: Solve for x
   x = 229,321,456.71/20,575.98
6. Step 6: Final answer
   x = 11,145.10