Finding the Fourth Proportional to 10,918.12, 16,365.41 and 5,283.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,918.12 : 16,365.41 = 5,283.89 : x
2. Step 2: Convert to fraction form
   10,918.12/16,365.41 = 5,283.89/x
3. Step 3: Cross multiply
   10,918.12x = 16,365.41 × 5,283.89
4. Step 4: Simplify right side
   10,918.12x = 86,472,999.83
5. Step 5: Solve for x
   x = 86,472,999.83/10,918.12
6. Step 6: Final answer
   x = 7,920.14