Finding the Fourth Proportional to 9,167.76, 12,650.85 and 5,189.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,167.76 : 12,650.85 = 5,189.31 : x
2. Step 2: Convert to fraction form
   9,167.76/12,650.85 = 5,189.31/x
3. Step 3: Cross multiply
   9,167.76x = 12,650.85 × 5,189.31
4. Step 4: Simplify right side
   9,167.76x = 65,649,182.41
5. Step 5: Solve for x
   x = 65,649,182.41/9,167.76
6. Step 6: Final answer
   x = 7,160.87