Finding the Fourth Proportional to 10,340.73, 15,513.83 and 5,409.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,340.73 : 15,513.83 = 5,409.05 : x
2. Step 2: Convert to fraction form
   10,340.73/15,513.83 = 5,409.05/x
3. Step 3: Cross multiply
   10,340.73x = 15,513.83 × 5,409.05
4. Step 4: Simplify right side
   10,340.73x = 83,914,977.55
5. Step 5: Solve for x
   x = 83,914,977.55/10,340.73
6. Step 6: Final answer
   x = 8,115.00