Finding the Fourth Proportional to 10,383.50, 15,579.81 and 5,451.99

Step by Step Solution

1. Step 1: Write the proportion equation
   10,383.50 : 15,579.81 = 5,451.99 : x
2. Step 2: Convert to fraction form
   10,383.50/15,579.81 = 5,451.99/x
3. Step 3: Cross multiply
   10,383.50x = 15,579.81 × 5,451.99
4. Step 4: Simplify right side
   10,383.50x = 84,940,968.32
5. Step 5: Solve for x
   x = 84,940,968.32/10,383.50
6. Step 6: Final answer
   x = 8,180.38