Finding the Fourth Proportional to 13,243.47, 19,868.37 and 4,478.46

Step by Step Solution

1. Step 1: Write the proportion equation
   13,243.47 : 19,868.37 = 4,478.46 : x
2. Step 2: Convert to fraction form
   13,243.47/19,868.37 = 4,478.46/x
3. Step 3: Cross multiply
   13,243.47x = 19,868.37 × 4,478.46
4. Step 4: Simplify right side
   13,243.47x = 88,979,700.31
5. Step 5: Solve for x
   x = 88,979,700.31/13,243.47
6. Step 6: Final answer
   x = 6,718.76