Finding the Fourth Proportional to 12,165.31, 18,212.41 and 10,997.99

Step by Step Solution

1. Step 1: Write the proportion equation
   12,165.31 : 18,212.41 = 10,997.99 : x
2. Step 2: Convert to fraction form
   12,165.31/18,212.41 = 10,997.99/x
3. Step 3: Cross multiply
   12,165.31x = 18,212.41 × 10,997.99
4. Step 4: Simplify right side
   12,165.31x = 200,299,996.48
5. Step 5: Solve for x
   x = 200,299,996.48/12,165.31
6. Step 6: Final answer
   x = 16,464.86