Finding the Fourth Proportional to 10,499.31, 15,735.60 and 5,571.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.31 : 15,735.60 = 5,571.27 : x
2. Step 2: Convert to fraction form
   10,499.31/15,735.60 = 5,571.27/x
3. Step 3: Cross multiply
   10,499.31x = 15,735.60 × 5,571.27
4. Step 4: Simplify right side
   10,499.31x = 87,667,276.21
5. Step 5: Solve for x
   x = 87,667,276.21/10,499.31
6. Step 6: Final answer
   x = 8,349.81