Finding the Fourth Proportional to 10,951.22, 16,421.88 and 5,109.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,951.22 : 16,421.88 = 5,109.50 : x
2. Step 2: Convert to fraction form
   10,951.22/16,421.88 = 5,109.50/x
3. Step 3: Cross multiply
   10,951.22x = 16,421.88 × 5,109.50
4. Step 4: Simplify right side
   10,951.22x = 83,907,595.86
5. Step 5: Solve for x
   x = 83,907,595.86/10,951.22
6. Step 6: Final answer
   x = 7,661.94