Finding the Fourth Proportional to 10,443.85, 15,646.15 and 5,172.73

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.85 : 15,646.15 = 5,172.73 : x
2. Step 2: Convert to fraction form
   10,443.85/15,646.15 = 5,172.73/x
3. Step 3: Cross multiply
   10,443.85x = 15,646.15 × 5,172.73
4. Step 4: Simplify right side
   10,443.85x = 80,933,205.40
5. Step 5: Solve for x
   x = 80,933,205.40/10,443.85
6. Step 6: Final answer
   x = 7,749.37