Finding the Fourth Proportional to 10,930.80, 16,361.64 and 7,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,930.80 : 16,361.64 = 7,800.72 : x
2. Step 2: Convert to fraction form
   10,930.80/16,361.64 = 7,800.72/x
3. Step 3: Cross multiply
   10,930.80x = 16,361.64 × 7,800.72
4. Step 4: Simplify right side
   10,930.80x = 127,632,572.38
5. Step 5: Solve for x
   x = 127,632,572.38/10,930.80
6. Step 6: Final answer
   x = 11,676.42