Finding the Fourth Proportional to 13,047.24, 19,574.53 and 4,288.31

Step by Step Solution

1. Step 1: Write the proportion equation
   13,047.24 : 19,574.53 = 4,288.31 : x
2. Step 2: Convert to fraction form
   13,047.24/19,574.53 = 4,288.31/x
3. Step 3: Cross multiply
   13,047.24x = 19,574.53 × 4,288.31
4. Step 4: Simplify right side
   13,047.24x = 83,941,544.15
5. Step 5: Solve for x
   x = 83,941,544.15/13,047.24
6. Step 6: Final answer
   x = 6,433.66