Finding the Fourth Proportional to 10,086.95, 13,918.68 and 5,609.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,086.95 : 13,918.68 = 5,609.81 : x
2. Step 2: Convert to fraction form
   10,086.95/13,918.68 = 5,609.81/x
3. Step 3: Cross multiply
   10,086.95x = 13,918.68 × 5,609.81
4. Step 4: Simplify right side
   10,086.95x = 78,081,150.25
5. Step 5: Solve for x
   x = 78,081,150.25/10,086.95
6. Step 6: Final answer
   x = 7,740.81