Finding the Fourth Proportional to 12,209.67, 16,851.50 and 7,173.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,209.67 : 16,851.50 = 7,173.89 : x
2. Step 2: Convert to fraction form
   12,209.67/16,851.50 = 7,173.89/x
3. Step 3: Cross multiply
   12,209.67x = 16,851.50 × 7,173.89
4. Step 4: Simplify right side
   12,209.67x = 120,890,741.01
5. Step 5: Solve for x
   x = 120,890,741.01/12,209.67
6. Step 6: Final answer
   x = 9,901.23