Finding the Fourth Proportional to 10,086.45, 13,917.99 and 5,609.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.45 : 13,917.99 = 5,609.31 : x
2. Step 2: Convert to fraction form
   10,086.45/13,917.99 = 5,609.31/x
3. Step 3: Cross multiply
   10,086.45x = 13,917.99 × 5,609.31
4. Step 4: Simplify right side
   10,086.45x = 78,070,320.49
5. Step 5: Solve for x
   x = 78,070,320.49/10,086.45
6. Step 6: Final answer
   x = 7,740.12