Finding the Fourth Proportional to 22,503.39, 31,053.74 and 12,942.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,503.39 : 31,053.74 = 12,942.55 : x
2. Step 2: Convert to fraction form
   22,503.39/31,053.74 = 12,942.55/x
3. Step 3: Cross multiply
   22,503.39x = 31,053.74 × 12,942.55
4. Step 4: Simplify right side
   22,503.39x = 401,914,582.64
5. Step 5: Solve for x
   x = 401,914,582.64/22,503.39
6. Step 6: Final answer
   x = 17,860.18