Finding the Fourth Proportional to 22,216.30, 30,657.60 and 12,145.10

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.30 : 30,657.60 = 12,145.10 : x
2. Step 2: Convert to fraction form
   22,216.30/30,657.60 = 12,145.10/x
3. Step 3: Cross multiply
   22,216.30x = 30,657.60 × 12,145.10
4. Step 4: Simplify right side
   22,216.30x = 372,339,617.76
5. Step 5: Solve for x
   x = 372,339,617.76/22,216.30
6. Step 6: Final answer
   x = 16,759.75