Finding the Fourth Proportional to 22,608.81, 31,196.82 and 12,917.58

Step by Step Solution

1. Step 1: Write the proportion equation
   22,608.81 : 31,196.82 = 12,917.58 : x
2. Step 2: Convert to fraction form
   22,608.81/31,196.82 = 12,917.58/x
3. Step 3: Cross multiply
   22,608.81x = 31,196.82 × 12,917.58
4. Step 4: Simplify right side
   22,608.81x = 402,987,418.10
5. Step 5: Solve for x
   x = 402,987,418.10/22,608.81
6. Step 6: Final answer
   x = 17,824.35