Finding the Fourth Proportional to 8,697.72, 12,011.37 and 7,431.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,697.72 : 12,011.37 = 7,431.36 : x
2. Step 2: Convert to fraction form
   8,697.72/12,011.37 = 7,431.36/x
3. Step 3: Cross multiply
   8,697.72x = 12,011.37 × 7,431.36
4. Step 4: Simplify right side
   8,697.72x = 89,260,814.56
5. Step 5: Solve for x
   x = 89,260,814.56/8,697.72
6. Step 6: Final answer
   x = 10,262.55