Finding the Fourth Proportional to 12,199.50, 16,835.31 and 6,610.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,199.50 : 16,835.31 = 6,610.50 : x
2. Step 2: Convert to fraction form
   12,199.50/16,835.31 = 6,610.50/x
3. Step 3: Cross multiply
   12,199.50x = 16,835.31 × 6,610.50
4. Step 4: Simplify right side
   12,199.50x = 111,289,816.76
5. Step 5: Solve for x
   x = 111,289,816.76/12,199.50
6. Step 6: Final answer
   x = 9,122.49