Finding the Fourth Proportional to 12,150.50, 16,767.69 and 6,561.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,150.50 : 16,767.69 = 6,561.50 : x
2. Step 2: Convert to fraction form
   12,150.50/16,767.69 = 6,561.50/x
3. Step 3: Cross multiply
   12,150.50x = 16,767.69 × 6,561.50
4. Step 4: Simplify right side
   12,150.50x = 110,021,197.94
5. Step 5: Solve for x
   x = 110,021,197.94/12,150.50
6. Step 6: Final answer
   x = 9,054.87