Finding the Fourth Proportional to 10,899.56, 16,356.70 and 3,974.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,899.56 : 16,356.70 = 3,974.76 : x
2. Step 2: Convert to fraction form
   10,899.56/16,356.70 = 3,974.76/x
3. Step 3: Cross multiply
   10,899.56x = 16,356.70 × 3,974.76
4. Step 4: Simplify right side
   10,899.56x = 65,013,956.89
5. Step 5: Solve for x
   x = 65,013,956.89/10,899.56
6. Step 6: Final answer
   x = 5,964.82