Finding the Fourth Proportional to 14,046.72, 21,080.96 and 5,289.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,046.72 : 21,080.96 = 5,289.60 : x
2. Step 2: Convert to fraction form
   14,046.72/21,080.96 = 5,289.60/x
3. Step 3: Cross multiply
   14,046.72x = 21,080.96 × 5,289.60
4. Step 4: Simplify right side
   14,046.72x = 111,509,846.02
5. Step 5: Solve for x
   x = 111,509,846.02/14,046.72
6. Step 6: Final answer
   x = 7,938.50