Finding the Fourth Proportional to 10,720.55, 16,086.31 and 5,104.58

Step by Step Solution

1. Step 1: Write the proportion equation
   10,720.55 : 16,086.31 = 5,104.58 : x
2. Step 2: Convert to fraction form
   10,720.55/16,086.31 = 5,104.58/x
3. Step 3: Cross multiply
   10,720.55x = 16,086.31 × 5,104.58
4. Step 4: Simplify right side
   10,720.55x = 82,113,775.87
5. Step 5: Solve for x
   x = 82,113,775.87/10,720.55
6. Step 6: Final answer
   x = 7,659.48