Finding the Fourth Proportional to 11,680.20, 16,123.86 and 7,908.84

Step by Step Solution

1. Step 1: Write the proportion equation
   11,680.20 : 16,123.86 = 7,908.84 : x
2. Step 2: Convert to fraction form
   11,680.20/16,123.86 = 7,908.84/x
3. Step 3: Cross multiply
   11,680.20x = 16,123.86 × 7,908.84
4. Step 4: Simplify right side
   11,680.20x = 127,521,028.92
5. Step 5: Solve for x
   x = 127,521,028.92/11,680.20
6. Step 6: Final answer
   x = 10,917.71