Finding the Fourth Proportional to 11,885.50, 16,373.37 and 9,997.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,885.50 : 16,373.37 = 9,997.12 : x
2. Step 2: Convert to fraction form
   11,885.50/16,373.37 = 9,997.12/x
3. Step 3: Cross multiply
   11,885.50x = 16,373.37 × 9,997.12
4. Step 4: Simplify right side
   11,885.50x = 163,686,544.69
5. Step 5: Solve for x
   x = 163,686,544.69/11,885.50
6. Step 6: Final answer
   x = 13,771.95