Finding the Fourth Proportional to 10,648.47, 15,978.19 and 5,727.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,648.47 : 15,978.19 = 5,727.72 : x
2. Step 2: Convert to fraction form
   10,648.47/15,978.19 = 5,727.72/x
3. Step 3: Cross multiply
   10,648.47x = 15,978.19 × 5,727.72
4. Step 4: Simplify right side
   10,648.47x = 91,518,598.43
5. Step 5: Solve for x
   x = 91,518,598.43/10,648.47
6. Step 6: Final answer
   x = 8,594.53