Finding the Fourth Proportional to 10,891.97, 16,337.61 and 3,100.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,891.97 : 16,337.61 = 3,100.78 : x
2. Step 2: Convert to fraction form
   10,891.97/16,337.61 = 3,100.78/x
3. Step 3: Cross multiply
   10,891.97x = 16,337.61 × 3,100.78
4. Step 4: Simplify right side
   10,891.97x = 50,659,237.14
5. Step 5: Solve for x
   x = 50,659,237.14/10,891.97
6. Step 6: Final answer
   x = 4,651.06