Finding the Fourth Proportional to 10,886.88, 16,332.72 and 3,961.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,886.88 : 16,332.72 = 3,961.20 : x
2. Step 2: Convert to fraction form
   10,886.88/16,332.72 = 3,961.20/x
3. Step 3: Cross multiply
   10,886.88x = 16,332.72 × 3,961.20
4. Step 4: Simplify right side
   10,886.88x = 64,697,170.46
5. Step 5: Solve for x
   x = 64,697,170.46/10,886.88
6. Step 6: Final answer
   x = 5,942.67