Finding the Fourth Proportional to 9,917.98, 13,686.73 and 5,441.60

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.98 : 13,686.73 = 5,441.60 : x
2. Step 2: Convert to fraction form
   9,917.98/13,686.73 = 5,441.60/x
3. Step 3: Cross multiply
   9,917.98x = 13,686.73 × 5,441.60
4. Step 4: Simplify right side
   9,917.98x = 74,477,730.58
5. Step 5: Solve for x
   x = 74,477,730.58/9,917.98
6. Step 6: Final answer
   x = 7,509.37