Finding the Fourth Proportional to 10,015.43, 13,821.50 and 5,539.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,015.43 : 13,821.50 = 5,539.60 : x
2. Step 2: Convert to fraction form
   10,015.43/13,821.50 = 5,539.60/x
3. Step 3: Cross multiply
   10,015.43x = 13,821.50 × 5,539.60
4. Step 4: Simplify right side
   10,015.43x = 76,565,608.59
5. Step 5: Solve for x
   x = 76,565,608.59/10,015.43
6. Step 6: Final answer
   x = 7,644.76