Finding the Fourth Proportional to 12,228.50, 16,885.67 and 7,760.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,228.50 : 16,885.67 = 7,760.18 : x
2. Step 2: Convert to fraction form
   12,228.50/16,885.67 = 7,760.18/x
3. Step 3: Cross multiply
   12,228.50x = 16,885.67 × 7,760.18
4. Step 4: Simplify right side
   12,228.50x = 131,035,715.39
5. Step 5: Solve for x
   x = 131,035,715.39/12,228.50
6. Step 6: Final answer
   x = 10,715.60