Finding the Fourth Proportional to 11,003.86, 16,513.98 and 5,164.57

Step by Step Solution

1. Step 1: Write the proportion equation
   11,003.86 : 16,513.98 = 5,164.57 : x
2. Step 2: Convert to fraction form
   11,003.86/16,513.98 = 5,164.57/x
3. Step 3: Cross multiply
   11,003.86x = 16,513.98 × 5,164.57
4. Step 4: Simplify right side
   11,003.86x = 85,287,605.69
5. Step 5: Solve for x
   x = 85,287,605.69/11,003.86
6. Step 6: Final answer
   x = 7,750.70