Finding the Fourth Proportional to 21,797.53, 30,079.56 and 12,107.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,797.53 : 30,079.56 = 12,107.61 : x
2. Step 2: Convert to fraction form
   21,797.53/30,079.56 = 12,107.61/x
3. Step 3: Cross multiply
   21,797.53x = 30,079.56 × 12,107.61
4. Step 4: Simplify right side
   21,797.53x = 364,191,581.45
5. Step 5: Solve for x
   x = 364,191,581.45/21,797.53
6. Step 6: Final answer
   x = 16,707.93