Finding the Fourth Proportional to 9,917.67, 13,686.77 and 5,441.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.67 : 13,686.77 = 5,441.61 : x
2. Step 2: Convert to fraction form
   9,917.67/13,686.77 = 5,441.61/x
3. Step 3: Cross multiply
   9,917.67x = 13,686.77 × 5,441.61
4. Step 4: Simplify right side
   9,917.67x = 74,478,129.43
5. Step 5: Solve for x
   x = 74,478,129.43/9,917.67
6. Step 6: Final answer
   x = 7,509.64