Finding the Fourth Proportional to 11,210.81, 16,817.42 and 3,813.89

Step by Step Solution

1. Step 1: Write the proportion equation
   11,210.81 : 16,817.42 = 3,813.89 : x
2. Step 2: Convert to fraction form
   11,210.81/16,817.42 = 3,813.89/x
3. Step 3: Cross multiply
   11,210.81x = 16,817.42 × 3,813.89
4. Step 4: Simplify right side
   11,210.81x = 64,139,715.41
5. Step 5: Solve for x
   x = 64,139,715.41/11,210.81
6. Step 6: Final answer
   x = 5,721.24