Finding the Fourth Proportional to 9,144.72, 12,615.12 and 5,999.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,144.72 : 12,615.12 = 5,999.76 : x
2. Step 2: Convert to fraction form
   9,144.72/12,615.12 = 5,999.76/x
3. Step 3: Cross multiply
   9,144.72x = 12,615.12 × 5,999.76
4. Step 4: Simplify right side
   9,144.72x = 75,687,692.37
5. Step 5: Solve for x
   x = 75,687,692.37/9,144.72
6. Step 6: Final answer
   x = 8,276.65