Finding the Fourth Proportional to 10,897.11, 16,335.81 and 3,969.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,897.11 : 16,335.81 = 3,969.99 : x
2. Step 2: Convert to fraction form
   10,897.11/16,335.81 = 3,969.99/x
3. Step 3: Cross multiply
   10,897.11x = 16,335.81 × 3,969.99
4. Step 4: Simplify right side
   10,897.11x = 64,853,002.34
5. Step 5: Solve for x
   x = 64,853,002.34/10,897.11
6. Step 6: Final answer
   x = 5,951.39