Finding the Fourth Proportional to 17,087.68, 23,581.56 and 9,917.05

Step by Step Solution

1. Step 1: Write the proportion equation
   17,087.68 : 23,581.56 = 9,917.05 : x
2. Step 2: Convert to fraction form
   17,087.68/23,581.56 = 9,917.05/x
3. Step 3: Cross multiply
   17,087.68x = 23,581.56 × 9,917.05
4. Step 4: Simplify right side
   17,087.68x = 233,859,448.37
5. Step 5: Solve for x
   x = 233,859,448.37/17,087.68
6. Step 6: Final answer
   x = 13,685.85