Finding the Fourth Proportional to 13,147.48, 19,708.46 and 5,247.71

Step by Step Solution

1. Step 1: Write the proportion equation
   13,147.48 : 19,708.46 = 5,247.71 : x
2. Step 2: Convert to fraction form
   13,147.48/19,708.46 = 5,247.71/x
3. Step 3: Cross multiply
   13,147.48x = 19,708.46 × 5,247.71
4. Step 4: Simplify right side
   13,147.48x = 103,424,157.85
5. Step 5: Solve for x
   x = 103,424,157.85/13,147.48
6. Step 6: Final answer
   x = 7,866.47