Finding the Fourth Proportional to 10,380.17, 15,569.75 and 5,709.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,380.17 : 15,569.75 = 5,709.31 : x
2. Step 2: Convert to fraction form
   10,380.17/15,569.75 = 5,709.31/x
3. Step 3: Cross multiply
   10,380.17x = 15,569.75 × 5,709.31
4. Step 4: Simplify right side
   10,380.17x = 88,892,504.72
5. Step 5: Solve for x
   x = 88,892,504.72/10,380.17
6. Step 6: Final answer
   x = 8,563.68