Finding the Fourth Proportional to 8,730.72, 12,049.20 and 5,375.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,730.72 : 12,049.20 = 5,375.76 : x
2. Step 2: Convert to fraction form
   8,730.72/12,049.20 = 5,375.76/x
3. Step 3: Cross multiply
   8,730.72x = 12,049.20 × 5,375.76
4. Step 4: Simplify right side
   8,730.72x = 64,773,607.39
5. Step 5: Solve for x
   x = 64,773,607.39/8,730.72
6. Step 6: Final answer
   x = 7,419.05