Finding the Fourth Proportional to 22,151.25, 30,568.91 and 12,215.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,151.25 : 30,568.91 = 12,215.25 : x
2. Step 2: Convert to fraction form
   22,151.25/30,568.91 = 12,215.25/x
3. Step 3: Cross multiply
   22,151.25x = 30,568.91 × 12,215.25
4. Step 4: Simplify right side
   22,151.25x = 373,406,816.80
5. Step 5: Solve for x
   x = 373,406,816.80/22,151.25
6. Step 6: Final answer
   x = 16,857.14