Finding the Fourth Proportional to 10,665, 15,997.32 and 8,798.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665 : 15,997.32 = 8,798.76 : x
2. Step 2: Convert to fraction form
   10,665/15,997.32 = 8,798.76/x
3. Step 3: Cross multiply
   10,665x = 15,997.32 × 8,798.76
4. Step 4: Simplify right side
   10,665x = 140,756,579.32
5. Step 5: Solve for x
   x = 140,756,579.32/10,665
6. Step 6: Final answer
   x = 13,197.99