Finding the Fourth Proportional to 10,015.97, 13,821.81 and 5,539.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,015.97 : 13,821.81 = 5,539.76 : x
2. Step 2: Convert to fraction form
   10,015.97/13,821.81 = 5,539.76/x
3. Step 3: Cross multiply
   10,015.97x = 13,821.81 × 5,539.76
4. Step 4: Simplify right side
   10,015.97x = 76,569,441.06
5. Step 5: Solve for x
   x = 76,569,441.06/10,015.97
6. Step 6: Final answer
   x = 7,644.73