Finding the Fourth Proportional to 22,412.69, 30,933.66 and 12,981.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,412.69 : 30,933.66 = 12,981.25 : x
2. Step 2: Convert to fraction form
   22,412.69/30,933.66 = 12,981.25/x
3. Step 3: Cross multiply
   22,412.69x = 30,933.66 × 12,981.25
4. Step 4: Simplify right side
   22,412.69x = 401,557,573.88
5. Step 5: Solve for x
   x = 401,557,573.88/22,412.69
6. Step 6: Final answer
   x = 17,916.53