Finding the Fourth Proportional to 10,342.49, 15,509.58 and 5,409.48

Step by Step Solution

1. Step 1: Write the proportion equation
   10,342.49 : 15,509.58 = 5,409.48 : x
2. Step 2: Convert to fraction form
   10,342.49/15,509.58 = 5,409.48/x
3. Step 3: Cross multiply
   10,342.49x = 15,509.58 × 5,409.48
4. Step 4: Simplify right side
   10,342.49x = 83,898,800.69
5. Step 5: Solve for x
   x = 83,898,800.69/10,342.49
6. Step 6: Final answer
   x = 8,112.05