Finding the Fourth Proportional to 22,216.89, 30,662.01 and 12,785.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.89 : 30,662.01 = 12,785.25 : x
2. Step 2: Convert to fraction form
   22,216.89/30,662.01 = 12,785.25/x
3. Step 3: Cross multiply
   22,216.89x = 30,662.01 × 12,785.25
4. Step 4: Simplify right side
   22,216.89x = 392,021,463.35
5. Step 5: Solve for x
   x = 392,021,463.35/22,216.89
6. Step 6: Final answer
   x = 17,645.20