Finding the Fourth Proportional to 22,187.34, 30,618.59 and 12,115.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,187.34 : 30,618.59 = 12,115.79 : x
2. Step 2: Convert to fraction form
   22,187.34/30,618.59 = 12,115.79/x
3. Step 3: Cross multiply
   22,187.34x = 30,618.59 × 12,115.79
4. Step 4: Simplify right side
   22,187.34x = 370,968,192.86
5. Step 5: Solve for x
   x = 370,968,192.86/22,187.34
6. Step 6: Final answer
   x = 16,719.81