Finding the Fourth Proportional to 10,919.63, 16,382.90 and 3,899.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,919.63 : 16,382.90 = 3,899.50 : x
2. Step 2: Convert to fraction form
   10,919.63/16,382.90 = 3,899.50/x
3. Step 3: Cross multiply
   10,919.63x = 16,382.90 × 3,899.50
4. Step 4: Simplify right side
   10,919.63x = 63,885,087.34
5. Step 5: Solve for x
   x = 63,885,087.34/10,919.63
6. Step 6: Final answer
   x = 5,850.48