Finding the Fourth Proportional to 9,918.16, 13,686.94 and 5,441.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.16 : 13,686.94 = 5,441.69 : x
2. Step 2: Convert to fraction form
   9,918.16/13,686.94 = 5,441.69/x
3. Step 3: Cross multiply
   9,918.16x = 13,686.94 × 5,441.69
4. Step 4: Simplify right side
   9,918.16x = 74,480,084.53
5. Step 5: Solve for x
   x = 74,480,084.53/9,918.16
6. Step 6: Final answer
   x = 7,509.47