Finding the Fourth Proportional to 11,008.91, 16,513.38 and 5,165.53

Step by Step Solution

1. Step 1: Write the proportion equation
   11,008.91 : 16,513.38 = 5,165.53 : x
2. Step 2: Convert to fraction form
   11,008.91/16,513.38 = 5,165.53/x
3. Step 3: Cross multiply
   11,008.91x = 16,513.38 × 5,165.53
4. Step 4: Simplify right side
   11,008.91x = 85,300,318.51
5. Step 5: Solve for x
   x = 85,300,318.51/11,008.91
6. Step 6: Final answer
   x = 7,748.30