Finding the Fourth Proportional to 12,196.74, 16,831.54 and 6,607.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,196.74 : 16,831.54 = 6,607.78 : x
2. Step 2: Convert to fraction form
   12,196.74/16,831.54 = 6,607.78/x
3. Step 3: Cross multiply
   12,196.74x = 16,831.54 × 6,607.78
4. Step 4: Simplify right side
   12,196.74x = 111,219,113.38
5. Step 5: Solve for x
   x = 111,219,113.38/12,196.74
6. Step 6: Final answer
   x = 9,118.76